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Definition
By Mayo Clinic staff
Heat rash — also known as prickly heat and miliaria — isn't just for babies. Though it's common in infants, heat rash can affect adults too, especially during hot, humid weather.
Heat rash develops when your sweat ducts become blocked and perspiration is trapped under your skin. Symptoms range from superficial blisters to deep, red lumps. Some forms of heat rash can be intensely itchy or prickly feeling.
Heat rash usually goes away on its own. Severe forms of heat rash may need medical care, but the best way to relieve symptoms is to cool your skin and prevent sweating.
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- Miliaria. The Merck Manuals: The Merck Manual for HealthCare Professionals. http://www.merck.com/mmpe/print/sec10/ch118/ch118e.html. Accessed Nov. 2, 2009.
- Acne, rosacea and related disorders. In: Habif TF. Clinical Dermatology. 5th ed. Maryland Heights, Mo.: Mosby; 2009. http://www.mdconsult.com/book/player/book.do?method=display&type=bookPage&decorator=header&eid=4-u1.0-B978-0-7234-3541-9..00016-X--s0970&uniq=174064897&isbn=978-0-7234-3541-9&sid=924617043#lpState=open&lpTab=contentsTab&content=4-u1.0-B978-0-7234-3541-9..00016-X--s0975%3Bfrom%3Dcontent%3Bisbn%3D978-0-7234-3541-9%3Btype%3DbookPage. Accessed Dec. 2, 2009.
- Extreme heat: A prevention guide to promote your personal health and safety. Centers for Disease Control and Prevention. http://www.bt.cdc.gov/disasters/extremeheat/heat_guide.asp. Accessed Nov. 1, 2009.
- Fealey RD, et al. Disorders of the eccrine sweat glands and sweating. In: Wolff K, et al. Fitzpatrick's Dermatology in General Medicine. 7th ed. New York, N.Y.; McGraw-Hill Companies; 2008. http://www.accessmedicine.com/content.aspx?aID=2985825. Accessed Dec. 2, 2009.
- Walker JS, et al. Heat emergencies. In: Tintinalli JE, et al. Tintinalli's Emergency Medicine: A Comprehensive Study Guide. 6th ed. New York, N.Y.: McGraw-Hill Companies; 2004. http://www.accessmedicine.com/content.aspx?aID=604435. Accessed Dec. 2, 2009.
- Godkar D. Rare skin disorder complicating doxorubicin therapy: Miliaria crystallina. American Journal of Therapeutics. 2005;12:275.
- Berger TG. Dermatologic disorders. In: McPhee SJ, et al. Current Medical Diagnosis and Treatment 2010. New York, N.Y.: McGraw-Hill Companies; 2010. http://www.accessmedicine.com/content.aspx?aID=747. Accessed Dec. 2, 2009.
- Seto CK, et al. Environmental illness in athletes. Clinics in Sports Medicine. 2005;24:695.
- Gibson LE (expert opinion). Mayo Clinic, Rochester, Minn. Dec. 9, 2009.
