Sebaceous cysts, commonly known as “powdery tumors,” are cysts that form in the sebaceous glands due to the accumulation of sebaceous glands in the glands after the ducts of the sebaceous glands are blocked. This is one of the most common benign skin tumors, especially in young people who are in the peak of their growth spurt. Sebaceous cysts are usually found on the scalp and face, where oil production is relatively high, followed by the trunk. The size of sebaceous cysts varies greatly due to their different depths and contents. It is often diagnosed as lipoma, fibroma, etc. Its most typical feature is that the tumor will have an opening in the skin, like a belly button. Sebaceous cysts grow very slowly, but the patient can still feel that they are growing. Many patients come to the clinic because of the odor of the cyst, which affects their interactions with others. Most of the patients who come to the clinic have the experience of squeezing out the cysts, and have squeezed out the tofu-like things before, hoping that it will be fine, but they often have to visit the clinic again because the cysts grow again. Treatment 1. Surgical removal Once diagnosed, the cyst should be surgically removed in its entirety (including the cyst wall). Surgery is the only thorough treatment for sebaceous cysts. During surgery, the skin attached to the cyst, especially when the duct opening is seen, can be removed along with the cyst by designing a pike shaped skin incision in the direction of the skin line. Special care should be taken during the separation, as the cyst wall is very thin and should be removed as completely as possible. If the cyst wall remains, it is prone to recurrence. If there are inflammatory manifestations such as redness, swelling, heat and pain before surgery, the inflammation should be controlled first and surgery should be arranged later. 2. If there is a complication of infection, anti-inflammatory treatment such as oral antibacterial medicine should be given, and if necessary, incision and drainage should be made, and surgical removal should be done after the inflammation subsides. Generally the scar will not be too obvious and the surgeon will design the incision line to follow the dermatoglyphic line. Prevention Sebaceous cysts often occur in areas with abundant sebaceous glands, such as the head and face, and are prone to combined infection, localized redness, swelling, pressure and pain, and even septic ulceration, therefore, surgical excision is recommended, and the wall of the cyst must be removed completely during surgery, otherwise it is easy to recur. People with sebaceous cysts should pay special attention to the care of the skin, pay attention to hygiene, avoid scratching, do diligent bathing, diligent dressing, diligent nail cutting. 1, when the sebaceous gland pores of the skin are blocked, the skin nerves tend to feel it. If the local cleaning is done in time at this time, the foreign substance blocking the sebaceous gland pores can often be removed, thus removing the cause of future occurrence of sebaceous cysts and thus eliminating the possibility of occurrence of powdery tumors. 2. If a patient finds a lump of sebaceous cyst on his body, if it increases significantly, it should be removed surgically to avoid further development of the lump or infection in the future. 3.If the powdery tumor on the body shows symptoms such as redness, swelling, infection and pain, the patient should go to the hospital in time. Keep the local cleanliness and anti-infection treatment at the same time to control the inflammation early.