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Sudamine is a heat rash caused by blocked sweat ducts, commonly appearing as small, clear blisters. Treatment involves allowing the skin to breathe and avoiding heavy creams or lotions. Loose, breathable clothing and avoiding certain medications can prevent recurring rashes.
Sudamine, or miliaria crystalline, is a form of rash from heat or sweat. The rash is caused by blocked sweat ducts which keep sweat trapped under the skin, causing a reaction. Newborns are more likely to get sweaty than older children and adults because their sweat glands aren’t fully developed, making them more prone to rupture or blockage. Rash symptoms usually appear in skin folds or areas where clothing is tight and rubs against the skin, such as the armpits, elbows, neck, chest, and groin.
The most common symptom of sudamines are small, clear blisters that break easily with pressure or friction. This is the mildest form of heat rash and usually doesn’t cause serious complications. While the blisters can be irritating, they aren’t usually painful or itchy. The condition usually occurs when people are outdoors in hot, humid weather or participate in activities that stimulate excessive sweating, such as playing sports.
Treatment for sweat is usually as simple as allowing the skin to breathe to reduce the amount of sweat trapped against the skin. Removing clothing from affected areas and moving to a cooler environment are the best ways to reduce sweating. Once the heat source is removed and the person stops sweating, the rash usually goes away quickly. Although blisters burst easily, people with sweat shouldn’t purposely pop them.
It is important for people with sweat rashes to wash their skin with cold water and a mild antibacterial soap after the rash has gone away. The tiny openings created when the blisters burst make the skin susceptible to infection from germs and bacteria in the environment. Allowing skin to air dry after washing can help prevent irritation of sensitive skin.
Most cases of sweat can be prevented by wearing loose clothing made from breathable fabrics, such as cotton, when spending long periods in hot weather or engaging in strenuous exercise. Placing newborns in front of a fan or a cool breeze can also help prevent the rash. Before going out or exercising, people prone to heat rash should avoid applying heavy creams or lotions. These products increase the risk of blockage of sweat ducts.
People who have recurring problems with sweat rashes should talk to their doctors about other possible contributing factors. Some medications can affect the sweat ducts and can make people taking them more prone to heat rash. Switching to another drug or changing the dosage can help alleviate these problems. Common medications that can cause rashes include clonidine, isotretinoin, and bethanechol.
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