Pimples usually refer to acne. It’s almost 50 years old and you do get acne. Acne is a chronic inflammatory skin disease of the sebaceous glandular units of hair follicles and can affect people of all ages, with a higher incidence in adolescents. The causes of acne have not been fully elucidated. Factors such as genetics, androgen-induced sebum secretion, Propionibacterium acnes colonization, and immune-inflammatory responses may be involved. In some patients, the onset of the disease is also influenced by genetic, immune, endocrine, emotional and dietary factors. The lesions are prevalent on the cheeks and forehead, followed by the chest, back and shoulders, and are mostly symmetrically distributed, often accompanied by enlarged pores and seborrhea. The various types of lesions include pimples at the follicular opening, inflammatory papules and pustules, as well as nodules, cysts and scarring. Acne can be treated in different ways depending on the lesion and its cause. Limiting the intake of high glycemic index foods and milk, which may trigger or aggravate acne, keeping the bowels clear and avoiding late nights can play a role in preventing acne. If acne occurs, it is recommended to go to the hospital in time for examination to clarify the cause of the disease and receive regular treatment under the guidance of the doctor.