1. Keep your toes toasty.
A case of cold feet could lead to a lot of achoo-ing, says Ron Eccles, PhD, director of the Common Cold Centre at Britain's Cardiff University. How? Chilly tootsies tell your brain to conserve your body's heat, he explains. The brain then responds by firing messages that reduce blood flow to areas that lose heat quickly, like the mucus membranes of the sinuses. Decreased blood flow means decreased flow of infection-fighting white blood cells, leaving your body more vulnerable to viruses. Dr. Eccles's advice: Wear warm socks.
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