Q. I had mild acne for years and have been taking care of it myself since I was a teenager. Now I’ve been told I have sebaceous cysts, which are much worse. Would you please explain what sebaceous ...

Cysts, abscesses and lipomas all have one common feature: they cause a lump or bump on the skin. All three are very common and I literally remove a hundred or more lipomas and sebaceous cysts a year.

A 77-year-old Caucasian man presents with an epidermoid cyst on his scalp, in the left parietal area. He tells you he has had the cyst for many years and it always seemed to remain the same. He is ...