What should you know about prickly heat all over the body?

When the body stays hot and sweat cannot evaporate, irritation can affect the trunk, neck, folds, and areas covered by clothing. Tiny prickling bumps, redness, stinging, and itch may become more noticeable after activity or in humid surroundings. Cooling often reduces the discomfort.

A widespread rash is not automatically heat rash. Allergy, infection, medication reactions, and other inflammatory conditions can also cause broad skin changes. Note the onset, recent products or medicines, fever, pain, blisters, and whether the rash fades when the skin cools.

Rest in a cool space, loosen or remove sweat-soaked clothing, and use gentle airflow. Wash with cool or lukewarm water, pat dry, and wear light breathable layers. Avoid scratching, hot showers, perfumed products, thick ointments, and strenuous activity until the skin settles.

Drink fluids according to your usual medical advice and monitor the rash. Do not apply a steroid cream over a large area or broken skin without professional guidance; the correct treatment depends on the cause and body location.

Arrange prompt medical review if the eruption is spreading despite cooling, lasts beyond a short period, becomes painful, forms blisters or pus, or comes with fever. Emergency care is needed for breathing difficulty, facial or tongue swelling, faintness, confusion, severe weakness, or a rapidly worsening rash.

Could this be heat rash or a medicine, allergy, infection, or inflammatory condition? Which areas should I treat, what products should I stop, and what signs mean I should seek urgent help?