Infection may be induced by squeezing out the wall of the cyst of acne, it is recommended not to squeeze it in the future, and usually it needs to be surgically removed when it appears. Under normal circumstances, sebaceous glands secrete sebum through the ducts to the skin, due to sebaceous gland duct blockage, resulting in the gradual accumulation of sebum, the formation of retention cysts, which are often found on the head, face, back and buttocks and other parts of the body, easy to be infected, easy to pus and break, and easy to recur. Smaller cysts usually have no obvious symptoms, while larger cysts may cause discomfort by compressing the surrounding tissues. Should be given medication first anti-infection treatment of inflammation elimination and then surgical treatment, usually pay attention to personal hygiene on the oil secretion will not do a good job of cleaning. It is recommended to go to the hospital in a timely manner to prevent delays in the condition, resulting in other damages.