Body surface swelling is simply a swelling that can be seen or clearly felt on the skin or under the skin. For example, pemphigoid, also known as sebaceous cyst, is a type of surface mass that we often encounter; lipomas and fibroids are also more common. In addition, hemangiomas located in the skin and subcutaneous, lymphangioleiomas, neurofibromas. Yellow tumors and dermatomal cysts are all body surface swellings. There are also moles, which we see most often, and skin cancer, which is less common, all of which are body surface masses. Some swellings grow on the face or other exposed areas and need to be removed in order to be removed, while some swellings are or may be malignant and must be surgically removed. Some swellings are benign but may cause pain or adverse consequences and need to be removed, such as hemangiomas and lymphangioleiomas. In fact, strictly speaking, only those masses that are seen by a regular physician and are deemed not to require resection or are definitely not malignant need to be removed, otherwise, all masses of unclear benign or malignant nature or those that are requested to be removed by the patient should be removed, and those of unclear nature should also be examined by pathology to clarify the nature of the mass. Generally, the removal of small masses requires only local anesthesia and can be performed on an outpatient basis. If the mass is large, hospitalization is required. If the mass is very large and some skin is removed, a skin graft or flap transfer is required to repair the wound left after removal of the mass. Although most of the surface swellings are minor surgeries and are not very painful during and after surgery, the skin needs to be cut, so there will definitely be scars after surgery. However, a professional surgeon can make the scar as small and inconspicuous as possible. A boil is not a swelling on the surface of the body, but a type of skin infection. The boil will be painful, red and raised, and later the tip of the boil will turn white, and if it is broken, yellowish-white pus will come out. When the boil is mostly white, it is said to be “ripe” and can be drained by incision, but cannot be removed. A pimple, also known as a sebaceous cyst, is a skin swelling that is almost identical to the surrounding skin when it is not infected, but can be seen or felt as a small, round or oval-shaped pouch. When infected, a pemphigoid is somewhat like a boil, but if it breaks, it flows out as something like a tofu crumb. Pink tumors should be removed as soon as possible when they are not infected, or if they are infected, anti-inflammatory medication should be taken to control the infection before surgery. Small moles can be removed by laser, freezing, or electric sweeping machine; large moles need to be removed surgically, or plucked out. Each of these methods has its own advantages and disadvantages: excision leaves a tiny strip of scar after surgery, and other methods may have a mild depression after surgery. ① If the color of the mole changes or grows rapidly or the surface breaks down, malignancy should be suspected, and the mole should then be removed and sent for pathological examination; ② moles that affect the face or aesthetics and cannot be removed by non-surgical methods can be removed. Lipomas and fibroids are benign tumors and will not recur after removal. However, some people have a tendency to have multiple occurrences. We have removed six small lipomas from one forearm at the same time, and people like this are likely to develop lipomas again. If they do not fall into this category, they will not recur. Some small, well-defined hemangiomas and lymphangioleiomas can be completely cured by surgical excision. However, most hemangiomas and lymphangioleiomas have not yet found a method that can completely eradicate them because of their extensive scope and unclear boundaries. The copper needle treatment pioneered by the Department of Formation of Peking University Third Hospital is effective in reducing the size of most hemangiomas and lymphangioleiomas, and copper needle treatment supplemented by surgical excision and vascular tethering or ligation has achieved satisfactory results in many cases. There are many treatment methods for hemangioma, such as sclerotherapy, isotope patching, freezing, laser, vascular embolization, surgical resection, and copper needle embolization. Depending on the situation, one or several methods can be used for combined treatment. Skin cancer includes squamous cell carcinoma, basal cell carcinoma and melanoma. Among them, squamous cell carcinoma and basal cell carcinoma are not very malignant and have a good prognosis as long as they are detected and treated in time. Melanoma is highly malignant and has a high mortality rate. Once diagnosed, it should be enlarged and resected, striving for radical treatment, and supplemented with chemotherapy and immunomodulatory treatment after surgery, which may help to improve survival time.