Acne and folliculitis are not the same thing, but are discussed in the following aspects: First, in terms of age of onset, acne is mainly seen in adolescence, generally between the ages of 15 and 25, while folliculitis affects mainly adults. Secondly, acne occurs mainly on the face, forehead, back, etc., where sebaceous glands are more active, whereas folliculitis is more widespread, mainly on the scalp, neck, buttocks, perianal area, etc., where there is more sweating. Once again, acne is mainly caused by the secretion of androgens and sebaceous glands during adolescence. The triggering factors of acne include inattentiveness to diet, including eating spicy, stimulating, greasy and sweet food, irregular work and rest, staying up late, mental tension and anxiety, endocrine disorders, irregular menstruation, etc. The causes of folliculitis are mainly high external temperature, excessive sweating, unclean skin and decreased body resistance. The triggering factors for folliculitis are long-term oral glucocorticoids, diabetes, obesity and other factors. Finally, the main clinical manifestation of acne is that it starts as acne and slowly turns into red inflammatory papules, which slowly turn into pustules, cysts and nodules, and acne usually has no obvious itching symptoms; the clinical manifestation of folliculitis starts as red inflammatory papules and slowly turns into pustules, and patients with folliculitis mostly have obvious itching.