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  2. May 6, 2022 · Heat rash — also known as prickly heat and miliaria — isn't just for babies. It affects adults, too, especially in hot, humid conditions. Heat rash occurs when sweat is trapped in the skin. Symptoms can range from small blisters to deep, inflamed lumps. Some forms of heat rash are very itchy.

  3. Dec 21, 2023 · What Does a Heat Rash Look Like? Heat rash looks like tiny raised bumps surrounded by red, irritated skin. On darker skin tones, the redness may be less noticeable, or it may look darker.

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  4. Apr 11, 2024 · In adults, this type of heat rash affects the upper trunk, scalp, neck, and body fold areas that rub against clothing. In children, it affects the trunk and skin of the neck, groin, and armpits. It sometimes causes pustules (raised, pus-filled growths) on the trunk and extremities.

  5. Oct 4, 2017 · Tiny red bumps and itching on an area of skin that has been exposed to heat and sweat for a long time are common signs of prickly heat. Sometimes the red bumps can develop into a series of tiny...

  6. Oct 4, 2021 · Prickly heat, a type of heat rash, can affect adults or children. Symptoms typically include a bumpy, red, itchy rash. Get prevention tips and much more.

  7. Aug 18, 2023 · Learn More. Where and when is heat rash likely to occur? Heat rash can appear on the neck, scalp, chest, groin, or elbow creases. "Heat rash can occur any time the body sweats, so it is common in hot, humid climates, during hospitalizations, from fever, and during exercise," says Dr. Waldman.