Many things: It could be a skin cyst, ingrown hair, folliculitis, lymph node, fatty tumor (lipoma), soft tissue cancer (sarcoma), hematoma (bruse from trauma) and many others.
Answered 2/28/2013
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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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