A sebaceous cyst is commonly known as a “powder tumor”, which is a cyst formed by the accumulation of sebaceous glands in the gland after the sebaceous ducts are blocked. This is one of the most common benign skin masses, and many people have had the experience of having a pimple, especially young people in their prime growth spurt. They often occur in adults on the head, face, back (personally, I find them most common) or buttocks. They are slow growing and may be asymptomatic, but can be red, swollen, hot and painful when infected. The cysts are round with well-defined borders, and the base is pushable and adherent to the skin. Black follicular pores can be seen in the center, and white sebum can flow out after squeezing or rupture, which can be used to identify lipomas, etc. Sebaceous cysts are often complicated by infection, causing the cysts to rupture and temporarily subside, but scarring will be formed and they are prone to recurrence. The chance of sebaceous cysts becoming cancerous is extremely rare. Surgery is the only treatment for sebaceous cysts. If there is inflammation such as redness, swelling, heat and pain before surgery, the inflammation should be controlled first before surgery. Lipoma is a benign tumor originating from adipose tissue. It is surrounded by a thin connective tissue capsule and contains normal fat cells that are divided into lobular groups by connective tissue bundles. Some lipomas contain more connective tissue or blood vessels in addition to a large amount of adipose tissue, forming a complex lipoma. These tumors tend to occur on the shoulders, back, buttocks and inner thighs, and head onset is also common. They are solitary, round, soft, with clear edges and easy to push. Those with indistinct borders should be aware of the possibility of malignant lipoma. Smaller lipomas that develop slowly and have no clinical symptoms generally do not require treatment. If it grows very large, feels painful or affects the beauty, surgery can be considered to remove it. (If a lesbian loves beauty, she can ask her doctor to perform intradermal suturing to make the scar smaller, but it depends on your specific situation to avoid poor drainage) 1. The tumor is bright red or purplish red, of different sizes and irregular shapes, with clear borders, not higher than the skin, but sometimes velvety. It can be treated by surgical excision or liquid nitrogen freezing and external X-ray irradiation. 2.Cavernous hemangioma mostly occurs in the skin or submucosa, often single, dark red or purplish red, unclear border, soft, compressive and swelling. It can be treated by intratumoral injection of sclerosing agents such as 5% sodium cod liver oil or 40% urea or by liquid nitrogen freezing and surgery. 3, trapezius hemangioma is worm-like sinuous, the skin is purplish red, there is arterial pulsation, if compression of the surrounding small arteries, the pulsation disappears, auscultation can sometimes be heard vascular murmur. The mass is soft in texture and sometimes hard nodules can be palpated as a result of thrombosis or perivascular inflammation, with significant compression and distension. It can be surgically removed, but angiography should be done before surgery to estimate the scope of surgery and the size of surgery. Acute abscesses Superficial abscesses are characterized by local redness, swelling, pain and pressure, with fluctuating sensation. Deep abscess is local diffuse swelling, pain and pressure pain, and fluctuation is not obvious. It should be promptly incised and drained, and antibacterial and anti-inflammatory drugs should be selected for treatment.