Out of more than 3,000 skin diseases, how do you know what condition you have? These 23 skin rash pictures and expert tips ...

Dark underarms may simply have to do with pigmentation and levels of melanin in the skin. But sometimes armpit discoloration ...

Miliaria rubra is a type of heat rash or prickly heat that happens when sweat becomes trapped under the skin. Children tend to get it more than adults because their sweat glands are still developing.