Heat Rash

What is heat rash?

Heat rash (prickly heat) is a rash of red or pink dots usually found on body areas covered by clothing. The skin around the dots may look red. In darker skin it may look purplish. Heat rash is most common in babies and young children, but it may affect adults in hot, humid climates.

What causes it?

Heat rash can develop when the sweat ducts become blocked, trapping sweat under the skin.

In babies, heat rash can be caused by well-meaning parents who dress their baby too warmly, but it can happen to any baby in very hot weather. A baby should be dressed as an adult would to be comfortable at the same temperature and activity level. Babies' hands and feet may feel cool to your touch, but that does not mean they need to be dressed too warmly in hot weather.

What are the symptoms?

Heat rash looks like dots or tiny pimples. Heat rash can appear on the head, neck, and trunk, but it can also be in other areas. It often leads to discomfort and itching. The rash areas can get irritated by clothing or scratching.

How is heat rash diagnosed?

Heat rash can usually be identified by its appearance. The rash looks like dots or tiny pimples. It usually doesn't require medical attention. But if it doesn't go away after 3 or 4 days, if it appears to be getting worse, or if your child develops a fever, contact your doctor right away.

How is it treated?

Most heat rashes heal on their own. The following steps can help relieve symptoms.

• Start by removing or loosening your child's clothing.
• Move your child to a cool, shady spot.
• Let the skin air-dry instead of using towels.
• Avoid ointments or other lotions. These can irritate the skin.

After the rash is gone, gradually expose your child to warmer temperatures so that their skin can acclimate.

How can you help prevent it?

The following tips can help prevent heat rash.

• Dress your child in as few clothes as possible during hot weather.
• Keep the skin cool and dry.
• Keep the sleeping area cool.