Sebaceous cyst: You have a cyst that may have become infected. See a dermatologist for help.
Answered 9/16/2013
4.9k views
Thanks for asking!: Probably a sebaceous cyst if you have had it for years. Get it checked out by your family doctor. If worsening headache you could go to an urgent care.
Answered 9/17/2013
4.9k views
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