Childhood is the key to why you’re so sweaty

The annoying thing about being a sweaty person and I am, I am a bit ashamed to admit, a fairly sweaty person is the way it sneaks up on you. It's never "Oh, the temperature is rising, therefore I am about to get sweaty." Rather, it's always, "How the hell did I get sweaty? It isn't even that hot!" For we sweaty folks, there's a certain helplessness to our condition, and this is right around the time of the year when it manifests itself the most, because the population's distribution of sweatiness seems so randomly, unfairly determined. All around us, we see friends, co-workers, family, and strangers with enviously dry skin. How do they do it? Why can't we be like them?

To find out more about why some people sweat more than others, and whether there's anything that can be done about it, I reached out to Dr. Laure Ritti, a researcher in dermatology at the University of Michigan Health System. Five really interesting points came out of our email conversation.
    1. Yes, you start sweating before you get that hot. The evolutionary purpose of sweating is, of course, to keep our temperature regulated. So the body responds pretty quickly even to subtle changes in temperature. As Ritti explained, "we sweat before we feel uncomfortably hot, and at lesser rates (instead of all of the sudden and profusely)." So that clamminess that comes before you even feel noticeably hot may be annoying, but it's normal and by design.
    4. You can maybe become less sweaty by not overdoing it with the AC all the time. "If you're exposed to 85 degrees often, the body will respond by starting sweating at maybe 82 instead (please note that in fact the body responds to internal temperatures, not external)," Ritti explained. "This is why 65 degrees in the spring usually feels warm while 65 degrees in the fall feels chilly. Why? The body is trained at the end of the summer but not in the spring."
    I asked if our summertime behavior might have an impact here: Since scurrying from air-conditioned building to air-conditioned building prevents us from acclimating to hot temperatures, could going easier on the AC help out people who feel they sweat too much? "Definitely!" she said. "That would be part of sweat-gland training to achieve more regular and controlled sweating."
    5. If you want to sweat less, cold water is probably a much better bet than an ice pack. This isn't all that surprising, but it points to an important, underappreciated fact about sweating: Our body is responding to our internal temperature, not our external temperature, as Ritti pointed out. Holding a cold pack up to your forehead (or anywhere else) "would cool you off somewhat by cooling down the blood that circulates in the skin that is in contact with the cold pack," and "might also provide a sense of relief, especially when applied to areas where skin blood flow is the highest (cheeks for instance). But a cold pack remains a relatively small surface area compared to the rest of the body so this may not be obviously the most efficient way."

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    Drinking cold water is much more effective, though, because of that external/internal thing you get a lot more internal cooling out of a cup of chilled water heading down your throat and into your stomach. "Visualize cooling down the content of your stomach and thereby cooling down internal organs," Ritti suggested. For those of us not looking forward to being drenched for large portions of the next three months, it's definitely worth a shot.

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