Milaria, commonly called heat rash or prickly heat, is skin irritation caused by clogged sweat ducts. Common in heat, high humidity and in restrictive clothing, many people experience heat rash during or after working out. The condition is particularly likely when people begin a new workout routine or exercise in hot, humid climates. In most cases, heat rash can be treated at home and does not require medical intervention.
Causes
Heat rash occurs when sweat glands are clogged. Babies are particularly susceptible to the condition, but adults may also develop heat rash after working out or sitting in the heat. Constricting clothing that does not allow the skin to breathe, working out in hot climates, overuse of moisturizing cream and some medications increase a person's susceptibility to heat rash.
Symptoms
Heat rash is most common in the skin folds along the armpits, back of the elbows and behind the knees. It typically develops during or shortly after working out. There may be small red blisters, bumps or irritated patches of skin. The telltale symptom of heat rash is skin that feels prickly or itchy. The affected area sometimes does not perspire, or perspires less than other areas.
Treatment
Calamine lotion and oatmeal baths effectively relieve the itching associated with heat rash. Keep the area dry and avoid wearing clothing that might rub or irritate it. Symptoms normally clear up after a few days, but if they get worse, if you develop a fever or if the rash spreads, seek medical care. Children with a heat rash should see their pediatrician.
Prevention
To prevent heat rash, wear loose-fitting, natural fabrics such as thin cotton while exercising. Whenever possible, exercise indoors or enter an air-conditioned building shortly after exercising. Use gentle soaps and avoid moisturizing your skin immediately before exercising.
References
- "The Portable Pediatrician"; William Sears, M.D., et al.; 2011
- "The Mayo Clinic Book of Home Remedies"; Mayo Clinic; 2010
- "American Medical Association Family Medical Guide"; American Medical Association; 2004
- MayoClinic.com; Heat Rash; Jan. 19, 2010
