Subcutaneous cysts are benign diseases, usually painless, formed by the proliferation of inflammatory tissues, and are found on the scalp, neck, and buttocks and back. The cysts are solitary or multiple, ranging from a few millimeters to several centimeters in diameter, soft and mobile, and slowly increasing in size, often adherent to the skin, painless, and may not require treatment. If the pressure is painful, or continues to increase in size, secondary infection can occur. In this case, surgery is recommended. If there is inflammation such as redness, swelling, heat and pain before surgery, the inflammation should be controlled first, you can take appropriate oral antibiotics, rub antibiotic ointment, and wait for the inflammation to be eliminated before surgery. The skin ducts connected to the cysts are removed together with the cysts, and if the cyst wall remains, it is easy to recur. Subcutaneous cysts may be caused by inflammation of the hair follicles or sebaceous glands, which are highly productive. Or it may be related to improper diet, such as spicy and irritating food, or lack of attention to personal hygiene, causing infection can lead to cysts. It is recommended to avoid spicy and stimulating foods and to have a low-fat diet. During the treatment period, we should pay attention to balanced nutrition and keep nutrient absorption, we can supplement foods with more vitamin A, such as apple, loquat, cherry, banana, cinnamon, tomato, eggplant, spinach, etc., which can promote cell growth. Do not squeeze the subcutaneous cyst, otherwise it will easily lead to the spread of infection, if it does not continue to increase, generally do not need to deal with, to regularly review, if necessary, surgery.