What Does Heat Rash Look Like

What does heat rash look like? It is important to be sure that the problem you are trying to treat is actually heat rash. After all, you don't want to pick a rash treatment without knowing the root of the problem.

Heat Rash
While heat rash is common among babies, adults can get heat rash, too. People often develop heat rash when the weather is hot and humid. The rash develops when the pores in the skin get plugged or clogged, preventing perspiration from reaching to the surface of your skin. When sweat emerges on your skin, the sweat evaporates, helping to cool your body. However, when perspiration is blocked underneath the skin, the trapped sweat can result in heat rash.

What Does Heat Rash Look Like?
Heat rash, which is also called miliaria, occurs in three forms, each of which has a different appearance:

  • Miliaria Crystallina: Both infants and adults can develop miliaria crystallina, the mildest type of heat rash. Miliaria cystallina occurs in the uppermost layers of the skin. This type of heat rash is characterized by little clear bumps or blisters. While these bumps don't hurt or itch, the blisters do pop easily.
  • Miliaria Rubra: Also called prickly heat, miliaria rubra develops deeper in the skin than does miliaria crystallina. This type of miliaria produces itchy red bumps.
  • Miliaria Profunda: This occurs less frequently than both crystallina and rubra. This is usually an adult condition that occurs after the person has had miliaria rubra several times. Miliaria profunda occurs in deeper layers of skin, resulting in a rash similar in appearance to goose bumps. Although in and of itself, miliaria profunda isn't particularly painful or itchy, the condition is typified by the inability to perspire. This can result in dizziness, nausea and low blood pressure, symptoms of heat exhaustion. 

Heat Rash Treatment
If you are experiencing heat exhaustion, cool down, preferably in air conditioning. In addition, lay on your back with your legs above your heart and drink cool fluids. If you don't feel better within about a half an hour, ask for medical help.

Most miliria goes away on its own after a few days. However, if your heat rash persists more than three or four days, if the rash looks like it is getting infected or you are getting a fever, contact your doctor for an appointment.

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