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NHS Choices Condition

Content supplied by NHS Choices

Prickly heat (also known as heat rash or miliaria) is an itchy, red rash that often causes a stinging or prickling sensation on the skin.

It usually occurs when you sweat more than usual, for example in a hot or humid climate, but it can also occur in winter. See Causes of prickly heat for more information.

Excessive sweating can block up your sweat glands to become blocked, which can trap sweat beneath your skin. This causes irritation, and results in the rash.

The rash can occur anywhere on your body, but it most commonly affects areas that are covered by clothing.

Who is affected

People who are overweight or sweat easily are more likely to get prickly heat.

Babies and children are also more prone to prickly heat because their sweat glands are not fully developed.

Outlook

Prickly heat is not a serious condition, and rarely requires any specific treatment. Most prickly heat rashes will heal within a few days.

view information about Prickly Heat on www.nhs.co.uk »

Important Notice

The information provided on this website (including any NHS Choices medical information) is for use as information or for educational purposes only and is not a substitute for professional medical care by a qualified doctor or other qualified healthcare professional. We do not warrant that any information included within this site will meet your health or medical requirements. This Embarrassing Bodies site does not provide any medical or diagnostic services so you should always check with a health professional if you have any concerns about your health.


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