Please don't listen to anything in these posts except for the one thing that makes sense, "go see your doctor". that's what you pay for insurance for...Don't believe what Patrick says, as much as it could be a major problem, it could also be as simple as a dermoid cyst.
What you have is most likely an infection that got trapped under your skin. Like christina's sistsers bumps, cysts can be mobile, or unattached to the skin, and can be easily moved around.
Until you have time to go to your pcp, hold a hot compress on it every day to relieve the pain and help the infection subside. Your doc will prob give you an antibiotic to help treat the inflammation/infection once he or she confirms what it is.
If you're going to get online advice, do it yourself! Please don't listen to the things people, who aren't md's, post here..
i joined this site just to tell you that becasue I was so appalled at what I saw people claiming.
Just see your dr : )