Heat Rash

  • Medical Author:
    Benjamin Wedro, MD, FACEP, FAAEM

    Dr. Ben Wedro practices emergency medicine at Gundersen Clinic, a regional trauma center in La Crosse, Wisconsin. His background includes undergraduate and medical studies at the University of Alberta, a Family Practice internship at Queen's University in Kingston, Ontario and residency training in Emergency Medicine at the University of Oklahoma Health Sciences Center.

  • Medical Editor: Charles Patrick Davis, MD, PhD
    Charles Patrick Davis, MD, PhD

    Charles Patrick Davis, MD, PhD

    Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.

Heat rash condition

Heat-Related Illness Signs and Symptoms

How to Recognize a Heat-Related Illness Signs and Symptoms

The following checklist can help you recognize the symptoms of heat-related illnesses:

  • Heat rash
  • Heat cramps
  • Heat syncope: Someone who experiences heat syncope (fainting) will experience the sudden onset of dizziness or fainting after exposure to high temperatures, particularly after exercising in the heat.
  • Heat exhaustion
  • Heat stroke

Quick GuideHeat Rash Pictures, Symptoms, Causes, & Treatments

Heat Rash Pictures, Symptoms, Causes, & Treatments

Heat rash facts

  • Heat rash occurs when the skin's sweat glands are blocked and the sweat produced cannot get to the surface of the skin to evaporate. This causes inflammation that results in a rash.
  • Common symptoms of heat rash include red bumps on the skin, and a prickly or itchy feeling to the skin (also known as prickly heat).
  • The rash appears as reddened skin with tiny blisters and is due to inflammation. It often occurs in skin creases or areas of tight clothing where air cannot circulate.
  • Heat rash usually fades when the skin is allowed to cool. Medical treatment is necessary only if the area becomes infected.
  • Heat rash can be prevented by avoiding hot, humid conditions, wearing lose fitting clothes and using air conditioning or fans to allow air to circulate.
Reviewed on 11/3/2015
References
Medically reviewed by Norman Levine, MD; American Board of Dermatology

REFERENCES:

Rakel R. Textbook of Family Medicine. 8th edition. Philadelphia: Saunders/Elsevier. 2011

WebMD.com. Heat Rash Overview.

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