(NAPSI)—It happens all the time: You’ve been swimming a lot and then one night when your head hits the pillow you suddenly notice that your ear hurts. You’ve got swimmer’s ear—but what causes it? Surprisingly, swimmer’s ear is not caused by swimming at all. It’s simply associated with swimming. It’s actually caused by bacteria or fungi that invade the ear canal.
Understanding the details behind this sort of thing is what the scientists known as toxicologists routinely do—that is, they determine the difference between what might cause an adverse health effect and what might only be associated with it.
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