Stephanie Warkotsch popped what she thought was a hormonal pimple, but it grew back and "got bigger and bigger" across her cheek.

Other differences between cysts and tumors also exist. Finding a lump under your skin can be alarming, but most of the time, it’s harmless. If it’s a cyst, it is a small sac filled with air ...

A lipoma is a lump under the skin that occurs due to an overgrowth of fat cells. Lipomas are typically harmless but people may wish to remove one that causes pain, complications, or other symptoms ...