Several things.: If enlarge and full, it could be too much estrogen, particularly if overweight. However, usually bilateral. I have wearing some inapproprate garments during mountain biking, giving me "friction" burn. This is stonger possibility. If it persists, see your doctor. A bandaid over the nipple should provide relief. I'm assuming no nipple rings!
Answered 3/27/2018
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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