Many possible reason: It could be any of a range of different things, from a minor skin infection to trauma to a tumor to a skin condition. You may want to have it checked out by your primary doctor.
Answered 3/23/2016
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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
A doctor has provided 1 answer
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