What are lipomas?
Lipomas are benign (not cancerous), slow-growing tumors that come from fat cells. They are usually round, moveable, flattened lumps under the skin. They feel soft and doughy or rubbery. Lipomas usually grow in the neck, shoulders, back or arms. Lipomas are the most common noncancerous tumor in adults. They can occur at any age, but they often appear when you're between 40 and 60 years of age. Sometimes they run in families. Sometimes they are caused by an injury. Most lipomas do not hurt unless they are squeezed or bruised.
Written by familydoctor.org editorial staff