Cysts are closed sac-like structures filled with fluid, pus, or other material. They can appear anywhere on the skin and vary in size.

FAQs:

• Are cysts harmful?
  Most are benign but can become painful or infected.

• Can they disappear on their own?
  Some may, but others require medical removal.

• What treatments are available?
  Drainage, surgical removal, or corticosteroid injections.