Summer rash is also known as sweat rash or heat rash or prickly heat occurs when sweat becomes trapped under the skin. Rashes are the most common problem in the hot work environment. The rash is a general term for an outbreak of bumps on the body that changes the way the skin looks and feels. The summer rash or heat rash can develop after a person sweats far more than usual and sweat glands become blocked. It looks like a red cluster or a pimple or small blister.
Normally, it happens in hot, humid conditions or by wearing heavy clothes. Usually, it affects that parts of your body which covered by clothes, such as the back, abdomen, neck, upper chest, groin or armpits.
It affects people of all ages and genders. It is common in babies and children due to their undeveloped sweet glands.
Generally, it clears up on its own in few days. But, in a rare case, it can get the medical condition.