Medicines for Prickly heat

What it is

Prickly heat (heat rash, or miliaria) is a common, harmless rash that develops in hot, humid conditions when sweat becomes trapped under the skin because the sweat glands are blocked. It causes a rash of tiny red or clear spots or blisters, often with an itchy, prickly or stinging feeling (hence the name), typically on areas where sweat gathers or clothing rubs — such as the neck, chest, back, tummy folds, and in the creases of the arms and legs. It is very common in babies and young children (whose sweat glands are still developing), and in adults in hot climates, during heatwaves, with fever, or with tight clothing that traps heat and sweat. Although uncomfortable and sometimes alarming to look at, it is not serious and usually clears quickly once the skin is cooled. It is diagnosed by its typical appearance and the hot conditions.

How it is treated

Prickly heat usually needs no medical treatment and settles on its own once the skin cools down, so the main approach is cooling the skin and avoiding overheating. Helpful measures include moving to a cooler, less humid place, wearing loose, light, breathable clothing (or removing excess layers, especially on babies), cooling the skin (for example with a cool shower or a cool, damp cloth), avoiding scented or heavy skin products that can block sweat glands, and keeping the skin cool and dry. Avoiding scratching helps prevent irritation and infection. For itching, simple soothing measures — such as a cool compress, calamine lotion, or an antihistamine if needed — can help. In babies, keeping them cool and not overdressing them prevents and treats it. If the rash does not settle when the skin is cooled, becomes very sore or infected (increasing redness, swelling, pus), or the child is unwell, a doctor can advise. The reassuring message is that prickly heat is harmless and quickly settles with cooling and loose clothing.