Lipoma

A lipoma is a common, benign growth made of fat cells that forms just under the skin. It usually feels soft, rubbery, and moves easily when pressed. Lipomas are typically painless and grow slowly.

They most often appear on the neck, shoulders, back, arms, and thighs, and a person can have one or several. The exact cause is not known, though lipomas sometimes run in families. They are not cancerous and rarely cause problems.

Most lipomas do not need treatment. A dermatologist may simply monitor the growth, especially if it is small and not bothersome. It is a good idea to have any new or changing lump evaluated to confirm the diagnosis.

If a lipoma becomes large, painful, or bothersome, or if the diagnosis is uncertain, it can be removed with a simple in-office procedure. Removal is usually straightforward and leaves a small scar.