The Runners Nipple:

Description:
When you have runner's nipple, you know it. Raw, painful, even bloody nipples are tough to miss, though sometimes you won't notice it until you get into the shower only to be treated to a decidedly unpleasant stinging sensation.

Common causes:
Chafing with a wet shirt or running singlet. Particularly during long summer runs, the constant friction of a sweaty, salty shirt can quickly rub your nipples raw. Cotton is particularly villainous here, since it tends to hold water and become heavy.

Helpful hints:
Before especially long runs and on hot days, smear a little petroleum jelly on the nipples (or really anywhere there might be some chafing). Wear softer, looser clothes, and avoid screen-printed designs on your shirts and singlets. Especially avoid cotton and instead seek out lighter wicking fabrics like CoolMax.  

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