Armpit rashes can be caused by allergic reactions, infections, and chronic conditions. Armpits are a common place to get rashes because the skin there is thin, folds up on itself, and can be hairy.

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

Perioral dermatitis is a rash that appears as clusters of inflamed skin and small raised bumps around the mouth and nose. The ...

Inverse psoriasis occurs in skin folds and is worsened by friction and sweat, Friedman adds. It can cause an armpit rash that becomes raw or cracks open, which can be itchy and very painful.

Often called "the itch that rashes," atopic dermatitis symptoms typically include patches of red, dry, inflamed skin ... seborrheic dermatitis can also appear in skin folds, like in the armpits, belly ...