Medically reviewed by Susan Bard, MD Some causes of underarm rash include infection, allergic reaction, and inflammation.

Prickly heat causes an itchy rash of red spots or tiny ... such as the armpits and groin. Candida infection is earmarked by ...

Irritant contact dermatitis of the armpit results in a red, inflamed ... result in red papules, bumps, or even larger boils that can be painful. The rash can also be itchy. How to treat it ...

Do you know what chigger bites look like? The tiny mites — also called berry bugs — may leave behind small, itchy red bumps. While it's easy to confuse chigger bites for other types of insect ...