The scalp can become infected if fungus or bacteria enter through the hair follicles or damaged skin. Causes include ringworm, folliculitis, and impetigo. Bacteria cause some common infections, such ...

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 cyst is a sac or cavity that may be filled with pus, semi-solid material, or air. It doesn’t usually cause pain until it gets large. An abscess is a painful, red infection that’s filled with pus. A ...