Bicycle riders deal with all sorts of heat-related problems. Short of riding a stationary bike, there is no way to avoid exposure to the elements while cycling. Heat rash, or prickly heat, is a classic problem for those who spend time in the sun, especially if the climate is humid. Take a common-sense approach to dealing with heat rash that includes treatment and prevention to make your bike rides more enjoyable.
Heat Rash
Heat rash is a skin irritation characterized by tiny red bumps that may blister. Medically, this condition is known as miliara and can take three forms. Miliaria crystallina is the least severe type of heat rash and appears over the top of sweat glands. Miliaria rubra and miliaria profunda tend to be harsher, because they cover more of the body and affect deeper layers of skin. All forms are related to exposure to humidity and sweating. A biker could experience any one of these conditions.
Treatment
The most effective treatment for a severe case of heat rash is to stay indoors. The climate is the direct cause of the problem, and avoiding humidity will allow the irritation to heal. Wash the affected skin with tepid water and pat dry with a clean towel. Dab Calamine lotion over the affected areas to help relieve itching. Cover the area with an anhydrous lanolin cream or ointment. This is an over-the-counter salve that helps to keep the rash from spreading. If the skin breaks open, bleeds or oozes, consult your doctor. Serious cases may require a prescription steroid.
Prevention
Wear proper clothing when you bike ride to prevent a heat rash outbreak. Avoid fabric that absorbs moisture, such as cotton. This will keep the skin wet. Instead, try clothes made for bike riders in Lycra or spandex. These fabrics will push sweat away from the body and allow it to evaporate. Dry skin is less likely to be affected by heat rash. Carry a towel with you to wipe off areas soaked in sweat, such as the neck or armpits. Skin areas with creases are vulnerable to pooling sweat that will lead to heat rash.
Considerations
Other conditions, such as an allergic reaction, may appear to be heat rash. Bike riding in hot weather has other risks. The heat rash may be a sign of impending heat stroke or exhaustion. If you stop sweating or feel lightheaded and nauseous, go indoors. If your rash begins to drain or pus appears, this is an indication of infection. See your doctor for treatment.
