Lipoma
A lipoma is a soft, fatty lump that grows under the skin. It is made of fat cells and is almost always harmless. Lipomas are usually slow-growing, painless, and feel soft or rubbery when touched. They can appear anywhere on the body but are most common on the neck, shoulders, back, arms, and thighs. Most lipomas don’t need treatment unless they become painful or bothersome. In those cases, a minor surgery can remove them.

Frequently Asked Questions
Lipomas are soft, fatty lumps that grow slowly under the skin. They are noncancerous and usually harmless.
Signs include a soft, movable lump under the skin that is usually painless. Lipomas can range from very small to several inches wide.
Most lipomas don't need treatment. If needed, they can be removed with a simple surgical procedure, especially if they are painful or growing.