Understanding Heat Rash -- Symptoms

Medically Reviewed by Debra Jaliman, MD on May 12, 2021

What Are the Symptoms of Heat Rash?

Picture of Heat RashSmall, itchy red bumps on the skin are the symptoms of heat rash. The rash may feel prickly, stinging, or burning.

Call Your Doctor About Heat Rash if:

  • The rash is severe or painful or does not go away on its own within a few days.
  • You develop an infection in an area where you recently had heat rash.
  • You have a fever or any other signs of illness.
  • The rash is bright red or has streaks.
  • The rash starts after you have been taking an antibiotic or new medication.


Show Sources


CDC: "Heat Stress."

The Merck Manual Home Health Handbook: "Prickly Heat."

Ely, J. American Family Physician, March 15, 2010.

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