Sweat helps maintain a normal body temperature. "Sweating is your body's way of reducing your internal body temperature," says dermatologist Patricia Farris, MD, a clinical assistant professor of dermatology at Tulane University in New Orleans.
When temperatures rise -- for any reason -- the sweat glands kick in to produce more sweat, Farris says. You might have a fever. You might be nervous. It may be hot outside. Or you may be exercising.
This is why "in summer, we sweat more," says Eric Schweiger, MD, a dermatologist and clinical instructor of dermatology at Mt. Sinai School of Medicine, New York.
Even your diet can play a role in your sweat output. "Some people have a sweating response to spicy foods," Schweiger says, as well as some hot foods or beverages.
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