Different causes: May be as simple as a pimple or ingrown hair or a cyst ( fluid filled sac) or infection like an abscess or something more serious requiring biopsy/excision for further diagnosis. If you've had it for some time, see your doctor.
Answered 1/10/2017
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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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