What causes repeated acne on the forehead

Acne is caused by four factors, including elevated androgen levels, sebum secretion, hyperkeratosis of hair follicles, blockage of pores, infection with Propionibacterium acnes, and immunity. Inflammatory factors and so on, these are the causes of acne, that is, the cause of acne. In addition, repeated acne on the forehead also needs to consider whether the hair is too long, causing pores to be closed. Long time blocked, so induced acne, but also need to consider. There are we need to consider staying up late, stress and other incentives. In addition, also need to consider defecation, irregular menstruation, love to eat sweets, greasy, these may induce acne, so, forehead repeated acne is caused by a variety of factors, need specific analysis of specific problems.