Acne vulgaris is a condition that is associated with excessive sebum secretion and abnormal keratinization of the cells surrounding the hair follicles. Acne is associated with excessive sebum secretion due to abnormal androgen levels, abnormal keratinization of perifollicular cells leading to abnormal follicle openings where sebum cannot be discharged, and overgrowth of Propionibacterium acnes. Some acne patients are also affected by heredity, emotional fluctuations and improper diet, which may trigger the disease. In addition to the above factors, an immune-inflammatory response can also cause sudden breakouts in some patients. Acne is usually characterized by pimples, papules and pustules, often accompanied by seborrhea. Patients need to take better care of their skin and should not squeeze the acne to avoid infection. It is recommended that acne sufferers follow the doctor’s instructions to use medication, pay attention to the rationality of the daily diet, and avoid the use of irritating cosmetics.