1. Break henna up into large pieces and put in a heatproof bowl. 2. Add hot water and let steep. Mix to a batter-like consistency. 3. Put on gloves and apply from back to front, coating hair thoroughly. 4. Cover in cling wrap for a more vibrant red. Leave on for two to four hours. 5. Rinse, shampoo, and condition hair. Tips: Always do a strand test first. Use face cream (or Ultra Bland) around your hairline and ears to protect skin. Wrap hair in cling film for a redder color.
This product does not contain animal products of any kind.
This product does not contain animal products of any kind.
This product may melt if shipped to a warm location.
This product may melt if shipped to a warm location.
Spectacularly vivid red henna
For aspiring redheads who want to stop traffic with unparalleled shine and color. That’s not too much to ask from a solid block of henna is it? Not if you make it like we do. Caca Rouge is the reddest of our henna dyes and it’s sure to get you noticed. We use the finest Persian henna; the leaves are dried and ground into a powder and mixed with conditioning cocoa butter, which forms the basis of our Cacas. Organic lemon juice helps to bring out the redness and gives hair shine and lustre. You’re left with stunning, shiny and healthy-looking hair.
- Red is for passion: To bring out the flame-haired temptress lurking beneath dull locks.
- Red, Redder, Reddest: Lighter hair will be left fiery and darker hair will be left with an auburn glow.
- Shine and spice: Lemon juice and rosemary add shine and clove bud oil gives a sexy, spicy scent.
= Natural ingredients = Safe syntheticsRed Henna (Lawsonia inermis) , Fair Trade Cocoa Butter (Theobroma cacao) , Fresh Lemon Juice (Citrus limonum) , Powdered Rosemary (Rosmarinus officinalis) , Clove Bud Oil (Eugenia caryophyllus) , *Citral , *Eugenol , *Geraniol , *Citronellol , *Limonene , *Linalool , Perfume
- How to use
- Customer Reviews
- Questions & Answers
Questions & Answers
Do you have questions about this product?
get answers from real customers and in-house experts with AnswerBox.
Q:My hair is naturally medium to dark brown. I got an ombre in my hair last august at a salon. I wanted my hair to be a dark orangey copper color fading into a lighter orange almost blonde at the bottom. so the salon put a glaze in my hair which was red, not copper/orange at all, and which washed out within 2 weeks. So now it's just brown to blonde ombre. I have not done anything to my hair since then. Do you think the henna will just wash out of my hair like the glaze? and do you think rouge is the color I want for more of an orange rather than the marron which I feel like is more red? Will it work on my darker brown hair? Thank youAsked on 6/4/2014 by Caraline from United States
A:Caca Rouge is exactly what you want for a red ombre. Marron will not show
well at all in your hair, it is more brown than RED. Henna tints your hair
so it won't be a vibrant orange on top but it will be a deeper orange red
and the tips will be bright. I think Caca Rouge is what you're looking
for. It won't wash out really but will change and settle over several
weeks. Go for it.Answered on 6/5/2014 by Anonymous
A:I have used the henna multiple times and it has never washed out, though
after a couple of months it has faded a bit. I did not want orange,so I
cannot answer that part of the question. My hair is medium to dark brown
and it works fine on it.Answered on 6/4/2014 by Anonymous
A:Henna is orange so that should be great for you. It's usually pretty
permanent, but results vary. You might not want to dye your ends with
henna if you want "almost blonde" though, because if it goes too dark,
you may not be able to lighten it again. You can't bleach or strip out
the color the same way you can with salon dye.
On your darkest hair it will probably only show up in sunlight.
Good luck!Answered on 6/4/2014 by Anonymous
Q:I have extremely long - little longer than tailbone and about 41 inches - and very thick, wavy hair, how much henna do I need to purchase to cover my entire head?Asked on 5/1/2014 by Endlessly from Minnesota
A:It is hard to say, but I would guess two full bricks. I would recommend mixing about a brick and a half to start because you can always add more if needed.Answered on 5/3/2014 by Kayla from LUSH DIRECT
Q:I have long thickish, curly, light blonde/dirty blonde hair. I have never dyed my hair, however I really wan to use this product. I'm afraid that my hair will come out orange because of how light it is. I really want more of a light strawberry blonde, help?Asked on 4/25/2014 by Allison from Pearland TX
A:With our hennas, we strongly recommend doing a strand test before going through with the full application to make sure the results are what you're looking for.Answered on 5/3/2014 by Jeanine from LUSH Direct
Q:I've used this product (and I like the end result), but I'm wanting to make my hair lighter for the summer season. I've been told that I cannot use chemical dye over the henna. Is this true? Do I just have to wait for my hair to grow out to ever dye it again?Asked on 4/16/2014 by Nikki from Chico, CA
A:If you choose to use a synthetic dye over henna, we suggest waiting at least 8 weeks or so, and as always, performing a strand test ahead of time to ensure you are happy with the results!Answered on 5/3/2014 by Melissa S from LUSH Direct
A:Yes, that is correct. You will need to wait until the henna colored hair
has grown out. You may want to consult a hair dresser to make sure.
MaryAnswered on 4/16/2014 by Anonymous
Q:I have been dying my hair chemically dark brown for over a year. My first application I left on for 5 hours and isn't quite bright enough yet. I read in the Q&As here that doing another application could help. Here's the question:
What can I do to help lift the dark brown other than chemical stripping before reapplying?Asked on 3/12/2014 by Niky from Minneapolis, MN
A:You can definitely reapply the Caca Marron as often as you like! We wouldn't recommend trying to lift the colour from the hair, particularly now that you've used the Caca Marron. Les Cacas work by sealing down the hair's cuticle, and glossing colour over the top of your existing shade. Our products would not be able to lift the existing colour from the hair, as this would require a chemical procedure that will pry open the hair strand (causing damage). My only suggestion would be to try out some brightening products such as the Marilyn hair treatment, and over time you may see the lemon and chamomile will give a slight lightening effect. If you have any further questions, please give our experts a call at 1-888-733-5874.Answered on 4/2/2014 by Megan from LUSH Direct
Q:I have slightly longer than shoulder length curly sort of brown sort of red hair (I've tried to dye it brown but no brown dye will stick over the red I had). How red will it probably make my hair and how much of the henna do I need? Is one order enough?Asked on 2/16/2014 by Rachel from United States
A:The Caca Rouge will change light brown-reddish hair to an intense, bright, shiny red. One standard block (all 6 pieces) will be more than enough, you might actually get away with 4 or 5 pieces depending on the thickness of your hair. The redder you want it, the longer you want to keep the henna on your hair (up to 8 hrs) and it's also really effective to wrap it in some kind of plastic material so that it's not exposed to oxygen. Both of these things will make it more red, if this is the effect you would like from it.Answered on 3/21/2014 by Kendra M from LUSH Direct
A:I had dark brown hair before I used the caca rouge, and honestly it did very little. I just had a very slight red tint after about three days. it's still there about month later, but it's not noticeable unless you're in direct sunlight. I used 3/4 of block, I have short but thick hair and left it on for three hours.Answered on 2/16/2014 by Anonymous
Q:I want to love this product, but it will just not take to my hair. I have dirty blonde/very light brown hair. I have been doing caca rouge since September. I leave it in my clean/dry hair for about six hours, don't shampoo my hair right away, and even when using chemical free shampoo, or no shampoo/conditioner the color washes out of my hair in about a week. (the last time I even went 3 days between hair washings to try to make it last). For the couple of days that the color is visible it's gorgeous and it breaks my heart knowing it's only temporary. What can I do to make this stick?Asked on 1/30/2014 by A from North Dakota
A:Sadly, there isn't anything that we can recommend that will cause the visible effects of the henna to last longer for you; this does vary from person to person. It may help to do a few consecutive applications, as the effects will build up, but I'd recommend trying this with a strand test to save yourself some time and henna in case it doesn't yield the results you're looking for!Answered on 3/25/2014 by Brandy from LUSH
A:This is a very strange problem. I have been using Lush's henna products for
about 4 years now and have never had that happen. I have reddish brown hair
and use a mix of rouge and marron to get a nice auburn. You might try
applying the henna without washing your hair the day before or the day of
application. Also stay away from conditioners the week before applying and
condition very well the first wash after application. I leave the henna on
over night and I have found it 'sticks' better if it's applied warm/hot and
wrapped immediately in cellophane (or a plastic bag). Hope this helps!
-LaurelAnswered on 2/5/2014 by Anonymous
Q:Okay so I'm looking for a good way to keep my hair red without having to repeating dye it with harsh box stuff. Several people have told me to try henna but this price is kinda of spendy... So I'm wondering how much you get from one order? How many applications? Basically, am I paying 25 bucks for a one time thing?Asked on 1/25/2014 by Jordan from CO
A:The number of uses you get out of one Henna bar completely depends on the length and thickness of your hair, however most people can get at least two treatments out of it.Answered on 3/21/2014 by Melissa S from LUSH Direct
A:It really depends on your hair because no two people are going to be the same--how long/thick/dry it is.
Obviously the longer, thicker, drier it is, the more product it is going to take. I've seen reviews where people with short pixie cuts just needed 1-2 of the squares. My hair is breast length and a little dry and pretty thick, and I used all but 1 square to do one treatment.
The guy at my LUSH store who did the application initially tried to get away with using 1/2 the block (He said for most people he can get away with this that way they get 2 whole treatments out of one block), then 2/3 of the way through he needed to mix up another square, then ended up needed to do one MORE square, to cover all of my hair. So I have one square left. Basically if I chose to do this again (which I probably will since I love the results), I'll end up with two squares left, then three, and so on...so eventually I'll get a whole treatment out of the leftovers--but, again, I have a lot of hair.Answered on 1/28/2014 by Amanda from Ann Arbor, MI
Q:Hi! I have blonde/light brown hair and a lot of highlights. I have always wanted red hair but am to scared to permanently dye it so i think this is possibly the best for me…..I want to know if I want like light red hair would I use this product and just leave it in for an hour or so? Im not sure sorry I have never done this before….Asked on 1/24/2014 by confusedwithhair from wake forest
A:Henna is a permanent dye, so if you are looking for something that is not permanent it is likely not the best choice for you. Because henna treats the hair so much differently than a synthetic dye does, you do need to keep it on for a longer amount of time to get results. Depending on your hair, we recommend anywhere from 3 hours and up. We absolutely recommend doing a strand test ahead of time to make sure you are happy with the results!Answered on 3/21/2014 by Melissa S from LUSH Direct
A:If you just leave it on for an hour your hair will feel conditioned but you might not get much color change. Beware that blonde and highlighted hair can turn orange-y with this product and then your best option is to cover it with Caca Brun (henna is like lacquer and chemical dyes probably won't penetrate it). When I had ash blonde and highlighted hair Caca Rouge turned my hair bright red in the standard 3 hours this product usually takes. I still use Caca Brun because I love how it thickens my hair and makes it "behave". BTW henna has to get hot enough to activate. In your case I'd definitely do a "strand test" so you know what you're getting :-)Answered on 2/12/2014 by Dana who used to work in a salon from Canada
Q:Okay, so I have black Asian hair. Unless I choose to bleach it (which I don't), my hair is hard to dye. I was very impressed how well this showed in my hair the first two times I used this. However the last two times I have used this I don't see the same results. :( I do it the same way every time and I make sure to store left over henna in a cool dry place. Any suggestions on why it isn't coming out like it did the first time?Asked on 12/20/2013 by M from Texas
A:You may want to try leaving the henna on the hair for a longer length of time, as it definitely takes a little more effort for it to be noticeable on darker hair. It may also be that there is still some color remaining in your hair, therefore, new color would be less noticeable than it was when you used it the first couple of times. If you haven't tried it already, we also recommend wrapping the hair in cling wrap once the henna has been applied to bring out a more vibrant red!Answered on 3/5/2014 by Melissa S from LUSH Direct
A:I also have very dark hair, and after doing a little research on the nature of Henna coloring I can tell you this:
Henna stains your hair rather than denaturing it and completely changing the color of each strand, like a traditional chemical dye does. So, instead of penetrating the hair cuticle, it stains the outer keratin of each hair. So, for folks like us with dark hair, the stain won't be as noticeable because our natural hair color is so much darker than the color the Henna produces.Answered on 1/7/2014 by Samantha from Cleveland, OH
Q:My hair is very light blonde naturally. I have never dyed it darker before and I want it to be a fiery red. I was wondering if I should combine two different hennas to get that result. What do you recommend? Also, I like the hair color of the woman in the video.Asked on 12/16/2013 by Cece the Cat from Omaha, NE
A:Combining hennas to create a different color than the standard 4 shades is absolutely safe to do. For the Caca Rouge, blonde hair will turn a deep, firecracker red. For Caca Marron it will turn a dark orangey, so blending the two dyes might result in the fiery red you are wanting.Answered on 2/26/2014 by Kendra M from LUSH Direct
A:I have medium brown hair that was dyed auburn before I used the henna. I
used just the Caca Rouge Mama and my hair was too orange for my taste. I
then used a mix of the Caca Rouge Mama and the Caca Maroon Mama and got the
right shade for me...dark auburn. Id use more of the Rouge with a bit of
the Maroon to tone down the orange.
I hope this helps!! Love the henna, I get TONS of compliments on my hair!Answered on 12/20/2013 by Anonymous
A:I have light brown hair and I combine Rouge and Marron--it doesn't make a
fiery red, but more a brownish red, so I am not sure combining would
work...if you want a fiery red, I would think that the Rouge alone would
work better.Answered on 12/16/2013 by Anonymous
Q:I have dirty blonde hair and am looking to get a reddish tint to my hair. I was wondering if it would be possible to add this to my hair conditioner to tint my hair over time (I realize it may take awhile). I usually wash my hair first in the shower and then leave the conditioner on for about 10 minutes while finishing up before rinsing it out. So my questions are, 1, do you think this would work? And 2, do you think there would be any safety issues with using this product daily over time?Asked on 11/9/2013 by KC
A:I wouldn't recommend combining our henna with your conditioner because the processing time for our henna is over 4 hrs. Even though you would be using it daily for 10 min, it wouldn't have enough time to adhere to your hair, even slightly.Answered on 11/15/2013 by Anonymous
Q:I have dark brown slightly reddish hair and I'm wondering if this product will be able to make it more red or if my hair is currently too dark for it to have any effect?Asked on 11/2/2013 by Kait from Pittsburgh
A:There is a chance that this will not turn your hair a bright red, but rather a red undertone and highlights. It will still make your hair shiny and very healthy looking and feeling! If you would like your hair to have a more red tone, you may also re-apply this henna on multiple occasions, the decision is up to you!!Answered on 11/28/2013 by Anonymous
A:I have really dark brown hair, too, and I found that Caca Rouge didn't do much to redden my hair. If anything it seemed to darken my hair and just give it subtle red highlights. It made my hair shiny and healthy looking, but the overall process to use Caca Rouge was just too messy and time consuming.. I'm still dedicated to finding an all-natural vegan hair color product, just not this one.Answered on 11/11/2013 by Anonymous
A:My hair is that color too. The red is barely noticeable indoors, but
glows in sunlight.Answered on 11/2/2013 by Anonymous
Q:I have strawberry-blondette hair, yellow-ish. I would like to make my hair a more strawberry color. I was wondering if I could use cassia obovata with the henna, to make it not as intense.Asked on 11/2/2013 by Bob
A:You may add cassia obovata to our henna, as it is just an excellent conditioner which makes your hair glossy and thick, with a healthy scalp. I would still recommend doing a strand test before using it in full.Answered on 11/28/2013 by Anonymous
A:I am not familiar with cassia obvata. Ive got natural medium brown hair. I
used a mix of the Caca Rouge and Caca Marron hennas and my hair is a lovely
auburn color. It was easy to use but a bit messy to clean up. Im sorry I
wasnt of more help.Answered on 11/3/2013 by Anonymous
Q:Hello, I have not dyed my hair yet, but in the directions it says to use ultrabalm. Is that mandatory or can I use something else?Asked on 10/22/2013 by Ashley first time Dyer
A:It is not mandatory that you use ultrabalm with this product. It is merely used around your hairline and ears to protect skin. You can continue with use without Ultrabalm but be sure to protect your skin while applying it!Answered on 11/28/2013 by Anonymous
A:You can use any kind of blocking aid. They suggest ultrabond because it works well.
Peace Love and HugsAnswered on 10/29/2013 by Anonymous
A:I didn't use anything to protect my hairline, neck or upper torso. I wore
an old tank top and threw a towel around my shoulders. If you've never dyed
your hair before you may benefit from Ultrabalm or Vaseline to keep your
work in check, but I find them unnecessary as I've been dying my hair on
and off for fifteen years. When dyeing, I usually set aside a dozen or so
paper towels that are damp and use those as needed when I see a drip or a
smudged spot. When I'm done, I clean out my ears, and do one quick wipe
around all the edges. I've never had noticeable staining following but your
mileage may vary depending on your experience. If you're worried, I'd get
it.Answered on 10/22/2013 by Anonymous
Q:I have black curly hair, what color will this product turn it to?Asked on 10/12/2013 by Lexi
A:With dark coloured hair, our Caca Rouge will create a subtle red undertone to your hair and not a vibrant red like you may expect. When in sunlight, the color should be the most visible but it is a more subtle color.Answered on 11/28/2013 by Anonymous
A:since your hair is so dark, it will remain dark but have red highlights. Wherever your hair is lighter it will be more red. when you go in the sunlight the red will be more prominent. I found that it also makes my hair healthier. I hope that helps :-)Answered on 10/14/2013 by Anonymous
Q:I'm assuming because this is natural and synthetic free, that it's probably safe, but I really wanna make sure before I invest. Does anyone have any experience using this on previously chemically dyed hair, and/or dreadlocks? Will it react negatively with my dyed hair? Will there be possible damage to my locks? My hair before dreads had really had a number done on it with chemical dyes and I want to opt for a less damaging and more importantly, natural vegan product. I've never used henna, so any tips you might have related to my hair are welcomed and much appreciated :) thanks!Asked on 10/11/2013 by sunnyweather from Florida
A:Our hennas contain all natural ingredients, so they do not react with conventional hair dyes the way hennas containing metallic salts will. We don't recommend using henna on dreadlocks as it can be very tough to rinse out, which makes it possible for residue to find its way into the locks.Answered on 12/19/2013 by Brandy from LUSH
A:I can't directly advise you, because my hair wasn't previously dyed or in dreads, but I've been using Lush hennas (I combine Caca Rouge & Caca Marron approx. half & half) for many years about every 4 to 6 weeks, and receive nothing but compliments on its color and shine. My grays pick up the red as 'copper', which I like.
I recommend you follow the directions and do a "test sample" first to see how you like it, and I think you probably will.
You can buy the Reincarnate shampoo (retro only, not in shops), but the effect will be very very mild and probably not much help in making your decision..
Good luck! I'd be surprised if you don't like the results.
~ Marnie from CaliforniaAnswered on 10/11/2013 by Anonymous
A:It had been a while since I chemically dyed my hair when I used Caca Rouge so I'm not sure what if any chemicals were left in my hair. My hair is very short, and this stuff was extremely messy & time consuming - I can't imagine using it on long hair! Plus, my medium brunette hair didn't turn any shade of red, it just became a darker shade of brown. On the plus side, my hair felt really silky & shiny, and it seemed to stay in good shape for a long time after. And my subtly wavy hair became even more curly and suddenly I had more styling options! Overall I just wasn't a fan of how time consuming & messy it was compared to box kits I've used before. I'm still committed to finding a henna hair product that's all natural, better for my hair & the environment, I'm just hoping to find it in an easier format. Hope this helps!Answered on 10/11/2013 by Anonymous
A:Hello my daughter did not follow the directions properly used coffee instead of water . Her hair did not change color because she didn't use it right but the condition of her hair after was very nice. We would use it again but follow directions next time. I hope this helps. It is a very gentle product.
Sent from my iPadAnswered on 10/11/2013 by Anonymous
A:I have very sensitive skin that doesn't react well to chemical dyes. I have
been using Lush's henna dye for about 4 years now and have never had a skin
reaction. When I first started using the product, and a few times since, I
have covered up chemical dye. The color turns out a bit different from the
un-dyed hair but it was a subtle difference for me and worth the switch.
Henna dye is totally worth the investment. It's cheaper than most box dyes
when you break it down and much better for your hair. It seems to condition
as well as dye. I don't know how it will affect your dreadlocks, I would
probably just leave it in for a minimum of 6 hours to make sure it really
gets in there. Be sure you break the blocks down to a fine consistency
before adding liquid. Sometimes it doesn't 'melt' completely if it's in big
chunks and is difficult to wash out that way. I usually put it on before
bed, cover my hair with plastic wrap and a towel and sleep on it. You can
leave henna on as long as you want without any bad side effects except red
skin (and that only lasts about a day)
:)Answered on 10/11/2013 by Anonymous
Q:After I color my hair with caca rouge mama henna and my roots begin to grow out, do you recommend that I recolor my whole head or just my roots to maintain my color? If I should just color my roots, will it match the rest of my previously colored hair? If I should recolor my whole head, will the root area match the previously colored area? Basically how do I maintain my hair color so it looks even?Asked on 10/8/2013 by Rachel from Bristol, IN
A:We find that it works quite well to mix a portion of henna to cover your roots, and then in a separate treatment do the full length of the hair (including the roots), but leave it on for a shorter length of time. This will help blend the roots with the existing color, and will give the hair a full color boost all around!Answered on 1/31/2014 by Melissa S from LUSH Direct
A:I always do the whole head. I do my daughters long curly hair. I apply it
very liberally at the roots, but less so on the length. I then twist about
a 1 inch thick section of hair and henna the outside of that twist
liberally creating a giant henna dreadlock. We have noticed that this
creates a subtle highlight effect throughout her hair each time we reapply
that is beautiful in the sunlight. Everyone thinks she is a natural redhead.Answered on 10/8/2013 by Anonymous
I always color my whole head again and it matches pretty well. I can
usually tell if I have missed spots in my root area, so I would go with the
whole head!...but different things work for different people, maybe try
both and see what you prefer.Answered on 10/8/2013 by Anonymous
A:I'd just recolor the whole thing. Think of henna like paint. The older
henna is resaturated by the fresh coat and the roots should match that
saturation so long as the henna is evenly applied. Works for me every time.Answered on 10/8/2013 by Anonymous
Q:I dyed my hair red recently with permanent hair dye. The red color has washed out alot on the lower portion of my hair due to that part being more porous from highlighting. The top part of my hair where my roots were growing out has held the red color more. If I apply the caca rouge henna all over my hair will it color it evenly or will the top be a different shade than the bottom? Also, will my blond highlights show through the henna at all?Asked on 10/3/2013 by rachel from bristol, in
A:The henna dye will most likely not dye your hair evenly after one application. If your roots are a different color than the rest of your hair, it could dye each area differently. The same thing holds true for the highlights--the lighter blond pieces will probably go a brighter red than the rest of your hair. To get a more even distribution of color, we would recommend applying the henna twice. The best way to see exactly how it's going to dye your hair would be to do a strand test by applying only a very small amount of henna on a hidden section of your hair.Answered on 1/29/2014 by Kendra M from LUSH Direct
A:I am no hair expert, but I doubt very seriously that the henna will even
out your hair, All I can give you is my experience. I have never used
anything but henna. My grey hair (which is expanding rapidly) is very
bright red an the rest is a lovely auburn. I think the lighter the hair,
the more red it becomes. An once you use henna there is no turning back. I
would see a professional to see if they could even out your hair all over
before trying the henna. My hairdresser loves that I use henna. He says the
gray makes for a very personal highlight pattern. Once again, I am no
expert, so my advice is to consult a pro firstAnswered on 10/4/2013 by Anonymous
A:I'm surprised that your red faded more in the highlighted parts -
usually damaged hair holds more color than virgin hair, in my
Henna color is translucent like a gloss, so differences in color show
through. Henna color is orange, not true red. Your blond highlights
will probably turn out carrot orange!! Darker hair will look darker
A lot of people think henna's translucency makes the color look more
natural than box dye, which tends to give a flatter color. If you want
a flat color, box dye may work better for that.
Henna can be very hard to remove, so be sure you are okay with having
carrot-orange hair before you do it! If that is what you want, henna
is great and will probably not fade as fast as box dye.
Longhaircommunity.com forums have lots of info on henna.
Good luck!Answered on 10/4/2013 by Anonymous
Q:I have dirty blonde hair that is fairly curly and very thick. I love what I've heard about Henna dye and your products, but I'm conflicted as to which one to use. I am hoping for a light red coppery ginger color.Asked on 9/9/2013 by Olivia
A:Caca Rouge is exactly what you want.Answered on 10/22/2013 by SH from Manassas, VA
A:It sounds as thought the Caca Rouge would be most suitable, as Caca Marron will probably result in a deeper hue than you're hoping for. As always, it's important to do a strand test before going on with the full application, just to make sure that the results are what you're looking for!Answered on 9/10/2013 by Brandy from LUSH