Sebaceous cysts: commonly known as “powdery tumors”, are cysts formed in the sebaceous glands due to the accumulation of sebaceous glands after the ducts of the sebaceous glands are blocked. This is the most common type of benign skin tumor, and many people have had the experience of growing pink tumors, especially young people in their prime growth spurt. Sebaceous cysts occur on the scalp and face, followed by the trunk, and can become infected secondary to blocked pores. Because of their different depths and contents, they vary in size and are very different, from small ones the size of a grain of rice to large ones the size of an egg, and are often diagnosed as lipomas, fibroids, etc. Sebaceous cysts grow very slowly, but patients can still feel that they are gradually increasing in size, and surgery is usually performed by complete excision, but there is a certain chance of recurrence after surgery. Dermatoglandular cyst: It is a congenital disorder, a kind of misshapen tumor, formed by the original base of skin cells that deviate from their original position. They are deep, do not adhere to the superficial skin, are soft and tough, and have a high tension. The base of the cyst often adheres to deep tissues such as fascia or periosteum and is immovable, and may form pressure marks on the local bone surface due to long-term compression. Lipoma is flat and lobulated and located under the skin. If the skin is pushed along both sides of the mass with fingers, orange peel-like signs may appear. Lipoma: It is a benign tumor formed by proliferating mature adipose tissue. It is mostly seen in adults aged 40-50. The tumor is soft, round or lobulated, located under the skin, and can be pushed; the size of the tumor varies, small ones are as big as dates and can be palpable by hand, large ones can be elevated on the skin surface, but the surface skin is normal. The tumor is single or multiple and can be found in any part of the body, with shoulder, back and abdomen being the most common. Most of them have no conscious symptoms. Angiomyolipoma is a special type of lipoma, which is more common in young people and is usually found in the lower limbs. It can be completely removed surgically, but there is also a chance of recurrence after surgery. Tenosynovial cyst: A cystic mass in the tendon sheath of the joint, a condition caused by degeneration of the connective tissue around the joint capsule. It contains a colorless, clear or orange, yellowish, thick mucus and is most often found on the back of the wrist and the back of the foot. Patients are mostly young adults, with women being more common. This disease belongs to the category of “tendon knot” and “tendon tumor” in Chinese medicine. It is characterized by a hemispherical elevation on the superficial surface of the skin, which is soft and pushable, mostly on the central part of the wrist. It is a slowly developing cystic swelling on the back of the wrist or the back of the foot, with a spherical shape, smooth surface, clear borders, soft texture, fluctuating sensation, no obvious conscious symptoms or slight soreness; when the cyst is filled with fluid, the wall becomes hard and local pressure is painful. When touched, the subcutaneous is full and has fluctuating cyst-like sensation, accompanied by wrist weakness, discomfort or pain, mostly soreness or radiating pain, and may have certain functional impairment. Tenosynovial cysts fall within the orthopedic category. Neurofibromas: They occur in young people and are autosomal dominant disorders, resulting from disorders of the ectodermal and mesodermal tissues, and can grow on the surface of the body or in internal organs. It is characterized by multi-system and multi-organ involvement, most notably in the central nervous system, and can cause a variety of tumors such as malignant tumors, neurofibromas, meningiomas, and gliomas; multifocality is its most common pathological feature, and surgery is often not a complete cure.