Ways to prevent heat rash

Heat rash occurs when sweat ducts become blocked and sweat irritates the surrounding skin. It is more likely in hot, humid weather, after strenuous activity, beneath tight clothing, or in skin folds where moisture and friction remain. Small bumps, prickling, redness, or an itchy rash can appear on the neck, chest, back, groin, or areas covered by clothing. Similar signs may come from contact dermatitis, infection, or another inflammatory condition.

Choose lightweight, loose clothing and change out of damp garments promptly. Use air conditioning, shade, fans, or cool showers during hot periods, and pat skin dry rather than rubbing it. Keep folds dry and avoid heavy occlusive products on areas that sweat easily. A bland emollient may help irritated skin when recommended, while topical corticosteroids should be used only with professional advice because the wrong product can worsen an infection. Do not scratch or apply fragranced products to a prickly rash.

Seek medical advice if bumps or redness persist after cooling the skin, return often, spread widely, or become painful. Prompt review is needed for pus, fever, marked tenderness, or rapidly worsening swelling. In a baby or vulnerable person, seek advice sooner if the rash is extensive or accompanied by reduced feeding, unusual sleepiness, or signs of overheating.

Ask whether the appearance fits heat rash, which products are safe for the affected site, and how to distinguish it from an infection or allergy. Ask how to prevent recurrence during work, exercise, travel, or humid weather.