The basic operation of surgery. Let’s take the body surface mass as an example, check the skin of the mass area for redness, swelling, ulceration and other abnormalities; check the size of the mass, the degree of adhesion with the surrounding skin, the mobility of the mass, the softness and hardness of the mass, and whether it is clearly delineated from the surrounding tissues. If there is no contraindication to surgery, surgical treatment can also be implemented. Firstly, the tumor is centered and sterilized with sterile treatment towels, the length of the incision is determined, and local invasive anesthesia is implemented. After satisfactory anesthesia, the skin and subcutaneous tissue are incised to the site of the mass, separation is made between normal tissue and the tumor, and the tumor is completely excised to ensure that there is no residue. Adequate hemostasis, suture the skin, ensure the normal blood flow of the incision, and wrap with sterile dressing to avoid infection.