A couple of things: If you have gotten a new bag or purse with a shoulder strap, that could be pinching your pectoral muscle on the right just enough to cause your armpit pain -- try changing that. If you're not pregnant, then the only other explanation for nipple pain i can come up with would be wrong bra or new activity. Like, if you are a runner, that action with a poorly-supporting bra could explain nipple pain.
Answered 4/6/2013
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A doctor has provided 1 answer
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