Heat rash, also known as prickly heat and miliaria, isn’t just for babies. Though it’s common in infants, heat rash can affect adults, too, especially during hot, humid weather.
What is heat rash?
Heat rash is a skin irritation that stings and makes your skin red. If you have heat rash, your skin may feel itchy, small bumps may form, and you may feel some “prickly,” tingling pain.
Heat rash occurs most often in hot, humid weather. If you sweat too much, sweat can get trapped under your skin and block your sweat glands. If your pores cannot clear out the sweat, you may get a rash.
Underneath the breasts
Elbows (in the creases)
What causes heat rash?
Although heat rashes are most common in newborns and infants, they can also affect adults. It is usually triggered by sweating too much, having a high body temperature, being overdressed or being in a very warm environment. Babies who are bundled in too much clothing and people who are not used to hot weather are most likely to get heat rash.
How can I treat heat rash?
The most effective treatment for heat rash is to keep your skin cool and dry.
Cool down. Avoid hot and humid places. If possible, stay in air-conditioned areas, or use fans to circulate the air. Use cool compresses to bring down the temperature of the affected skin.
Dry off. Keep the irritated skin dry. Use a fan to dry the skin off faster and to reduce sweating.
Reduce friction. Wear loose clothes to prevent irritation caused by clothing that rubs against the skin.
Treat fever. If you have a fever, treat it with an over-the-counter drug, like acetaminophen (brand name: Tylenol) or ibuprofen (some brand names: Advil, Motrin), according to the directions on the package.
There are several topical treatment options available to ease the irritation. Applying calamine lotion on the affected area can help relieve itching and burning. Aloe vera gel is another good way to soothe heat rash, but keep in mind that too much of these or any other lotions or ointments can further exacerbate the rash by maintaining moisture.
If your rash is severe, your doctor may prescribe a lotion to help relieve your pain or discomfort.
When should I go to the doctor?
In most cases, heat rash goes away on its own. If your heat rash doesn’t go away after 3 or 4 days, or if it seems to be getting worse, talk to your doctor. In some cases, heat rash may be caused by an infection. See your doctor if your itchiness is severe or if the rash area swells or oozes pus. If you feel dizzy, nauseous, or confused, or you have trouble breathing, go to the emergency room right away. These symptoms can be signs of serious heat-related illnesses, such as heat exhaustion or heatstroke.
How can I prevent heat rash?
In hot weather, dress yourself or your baby in lightweight cotton clothing. Cotton helps absorb moisture to keep it off of your skin.
If the weather is hot, turn on the air conditioner, or use a fan to help you stay cool and dry.
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