Nowadays, many middle-aged and older adults unintentionally find many lumps on their bodies above the skin surface, which are painless when pressed, and only become symptomatic when they become infected and come to the hospital. Lipoma is located in the deep dermis, subcutaneous layer, spherical, nodular or lobular appearance, the tumor body is mainly composed of mature fat cells, the envelope is thin and complete, fibrous tissue from the envelope to the tumor body distribution of fibrous intervals, forming trabecular branches, separating the tumor body into lobules of different sizes, larger than normal fat lobules, the cut surface is light yellow, soft, fat greasy, vascular distribution can be seen in the trabeculae, capillaries The vascular distribution of the tumor is often uneven, with more vessels on the surface or on one side of the tumor. Lipoma is a very common subcutaneous soft tissue tumor with slow growth and no destructive tissue, which is benign and accounts for 49% of soft tissue tumors. It is mostly seen in middle-aged people and is rare in children under 10 years old. It can occur in any area where fat exists, mostly under the skin. The tumor site is locally elevated, which is often the main reason for patients to visit the clinic. It is soft and elastic in texture, with pseudo-volatility, some mobility, no redness, no adhesions, and no pressure pain. Growth is slow, but can be of enormous size. Most of them are solitary lipomas, divided into superficial type and deep type. The superficial type is located in the subcutaneous tissue and mainly occurs in the back, neck, shoulders, abdomen and proximal extremities, but is rare in the face, hands, feet and lower legs. The deep tissue type is less common than the superficial type, and can occur in the septum, deep muscle layer and retroperitoneum, etc. It can be malignant. Multiple lipomas account for about 5% to 8% of lipomas. Color ultrasound (B-ultrasound) provides the advantages of easy, painless and non-invasive examination of lipoma, and also provides important significance to eliminate patients’ fear and guide clinicians’ treatment.