Back to Health A to Z. Heat rash is uncomfortable, but usually harmless. It usually gets better on its own after a few days. The rash often looks red, but this may be less obvious on brown or black skin. It can appear anywhere on the body and spread, but it cannot be passed on to other people. Look at other rashes in children. The main thing to do is keep your skin cool so you do not sweat and irritate the rash.
How you can treat or prevent heat rash yourself
A Michigan Medicine dermatologist shares everything to know about heat rash symptoms, prevention, treatment and how to discern it from other skin conditions in disguise. With temperatures rising and sun shining, you could get a heat rash. But unlike sunburn, heat rash can cause small, itchy, fluid-filled bumps on the skin, and it can be skin that was never even exposed to sunlight. The rash is caused by heat and tends to present around the hair follicles in areas with increased sweating or friction, like in skin folds. This includes the underarms and groin, and places where clothing causes friction, particularly on the back.
Heat rash miliaria rubra , also known as prickly heat, is a rash of small red bumps caused by blockage of the sweat glands. It can be due to high fever, excessive sweating, or being over-bundled. It is commonly seen in hot, humid tropical climates. It can cause discomfort, itching, and, sometimes, stinging or "prickly"-type pain. Heat rash is more common in hot, humid tropical climates. Someone who is new to such an environment is especially vulnerable.
The condition that we call prickly heat happens to adults and children when sweat becomes trapped under the skin. Children tend to get it more than adults because their sweat glands are still developing. Prickly heat is uncomfortable and itchy. There are treatment options and prevention tips for people who frequently get prickly heat. The symptoms of prickly heat are fairly straightforward. Red bumps and itching occur in an area where sweat has been trapped underneath layers of skin. The neck, shoulders, and chest are the most common places for prickly heat to appear.