The most common cause of acne on the brow is acne vulgaris, also known as pimples, which occurs in adolescents, and may also be caused by pathogenic microbial infections, folliculitis, both of which occur on the head and face, and have similar symptoms. The lesions are papules, pustules, nodules and cysts, resembling pimples, which are acne. It is a disease of the sebaceous glands of the hair follicles caused by a combination of factors, including abnormal regulation of the sebaceous glands by androgen secretion, excessive sebum secretion, hyperkeratosis of the hair follicles, excessive proliferation of Propionibacterium acnes, and other factors, as well as genetics and psychological factors, etc. Local treatment is mostly used, with topical vitamin A acid drugs preferred. The first thing you need to do is to use topical antibiotics, or add blue light irradiation, fruit acid therapy and other physical treatments. 2.