Lipomas are benign tumors of proliferating fat cells that do not spread. Lipoma is a tumor formed by normal fat-like tissue and is a benign tumor caused by abnormal proliferation of fat cells. The tumor is well defined, lobulated, soft and slow growing. Lipoma is considered to be related to systemic lipid metabolism abnormality and does not have the nature of spreading. Lipomas are most commonly found on the limbs and trunk, often on the arms and thighs, or on the neck, shoulders, and back, and appear as small, painless masses that may be confined to the subcutaneous area. Some lipomas may also occur in deeper areas such as the retroperitoneum. Lipomas that are confined to superficial areas of the skin may be left untreated if there are no uncomfortable symptoms. Deep lipomas or superficial lipomas that cause discomfort can be treated with surgery. Patients with lipomas are advised to pay attention to observation. If there are symptoms of pressure or rapid growth, they should go to the hospital in time for surgery and pathological examination.