A sun rash is an immune system reaction to sunlight exposure that causes itchy bumps, raised patches, or blisters on your ...

However, as it progresses, it can cause symptoms such as itchy skin, pruritus, and a rash. Around 35.5 million adults in the United States live with kidney disease, but only about 10% know they ...

Skin biopsy: To do this, your dermatologist removes a small sample from your rash, so that it can be examined under a microscope. Nail biopsy: If lichen planus may be affecting one or more of your ...

Medically reviewed by Brendan Camp, MD Hyperpigmentation (skin that is darker than the surrounding skin) in the underarms can have several causes. Acanthosis nigricans (AN) is a common cause. AN ...

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.

A 31-year-old woman of Middle Eastern descent is referred for evaluation of a rash affecting her upper back and lower legs ... Physical examination reveals well-demarcated hyperpigmented macules.