You have between 2 and 4 million sweat glands in your body.
Your feet alone have about 250,000 sweat glands between them.
Sweating from stress and sweating to cool down are chemically different. When you sweat because you’re hot, it comes from your eccrine glands, but when you sweat because you’re stressed, it comes from your apocrine glands.
The name for excessive sweating is hyperhidrosis, and about 3 percent of people have it.
On the other hand, the name for absent sweating (or not sweating at all) is anhidrosis, which is dangerous because your body can overheat.
Sweat has a stinky reputation, but sweat itself doesn’t actually smell. The odor comes from the bacteria on your skin instead.
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