Sweat rash is a rash that develops when the body heats up and perspires, and the rash is usually caused by minimal or significant blockage of the sweat glands. Many people know this rash by other names such as prickly heat, and medically it is known as miliaria. Mild forms of heat or sweat rash are known as miliaria rubra, but severe forms, which are fortunately rare, are called miliaria profunda.
The type of rash that develops with sweat can differ depending on the location on the body. It most often appears in patches, usually on parts of the body that are isolated from the air, such as between skin folds. The areas under the belly, in the armpits, and under the breasts are the main possible locations for the rash. Usually the rash does not spread, and simply looks like a collection of red pimples or blisters, but if the person becomes severely overheated, the rash could be present over a significant part of the body or in several different large patches.
The reason sweat rash is called prickly heat is because the rash can itch or itch. Others note that it is very itchy and uncomfortable for its duration. The good news for most people is that the rash often resolves in just a couple of days. Recommended treatments may include wearing cool clothing, bathing and drying the rash areas, and using a water-based anti-itch cream if needed. Others find the benefit of baby powder or cornstarch to reduce perspiration.
Most suggest that seeing a doctor is rarely necessary unless the rash is profuse or if the blistering parts break and crust over on the skin. The latter may be an infection or it could be chicken pox, especially if the rash is not confined to one area but occurs in spots rather than patches. Whenever the rash appears infected, a doctor should be consulted to avoid a possible blood infection or cellulitis.
It can be difficult to avoid sweat rash, and some people seem more likely than others to get it. Those in humid areas tend to have more because these areas cause more perspiration. It doesn't necessarily have to be hot for the rash to occur, and some people will develop the condition with significant exercise and perspiration, or if they have a very high fever. Those trying to avoid the rash are advised to use air conditioning, dress for the weather, and employ things like showers to cool off.
A very severe version of sweat rash called miliaria profundus is usually not best treated at home. This rash may spread over a larger part of the body and be white in color instead of the bumpy red. It does not sting or sting, but rather burns. Due to the great discomfort that this more serious form of sweat rash creates, it is recommended to seek medical help if it occurs.