Lipoma is a kind of benign tumor composed of fat, which can be classified into common lipoma, variant lipoma and so on according to the location and type of its occurrence, and may present with localized lumps, pain and other manifestations. The specific cause of lipoma is not clear, it may be related to dietary factors, mental stress, poor living habits, etc. Fat can be deposited in the subcutaneous and soft tissues, resulting in localized lipoma. Depending on the location and type, they are classified into common lipoma, which is the most common mass occurring under the skin; variant lipoma, such as angiomyolipoma, chondrolipoma, etc.; ectopic lipoma, which can occur in intramuscular and tendon sheaths, etc.; infiltrative lipoma, such as diffuse lipoma, etc.; and benign brown lipoma. The performance of lipoma is atypical, mainly manifested as localized single or multiple lumps, which can be seen in the neck, abdomen, back, limbs and other parts of the body, with soft texture and doughy touch; some of the lipomas can be painful due to the compression of nerves or surrounding tissues. It is recommended that the related people should consult the doctor in time, and make early diagnosis and active treatment.