I have a sebaceous cyst on top of my head. Where can I go to get it removed and how much will it cost? Would insurance cover it?

If indeed we are talking about a mucous cyst of the lips, there is a chance that it will spontaneously disappear left alone (which means not manipulating it constantly or continually biting it accidentally) given enough time. For those less patient or who cannot resist the temptation to play...

Do you want to just be smaller or as free as you can from your fibrocystic disease/tissue?  If the former, a reduction is indicated, assuming the weight removed will meet your insurance companies minimums.  If the latter, a SQ mastectomy with reconstruction would be suggested with...

When you have something removed surgically, it generally will create scar tissue which often destroys the hair follicles in that area. Generally if you grow your hair longer, the scars will be fairly inconspicuous because they will be covered by neighboring hair.