If acne occurs around the female mouth, the causes are irritation reaction, secondary perioral dermatitis, allergy, etc., as follows: 1, irritation reaction: there may be a serious irritation reaction around the mouth. This inflammation may be the patient’s local production of certain bacterial infections, for example, there may be because of Propionibacterium acnes infection, and the formation of inflammatory papules, which is mainly manifested as acne skin damage. 2, secondary perioral dermatitis: some women if the gastrointestinal tract function abnormalities, in particular, the emergence of Helicobacter pylori infection, may be formed in certain secondary perioral dermatitis. This is also manifested as inflammatory irritation symptoms around the mouth, so there are also people who may manifest the phenomenon of acne. 3, allergy: there are also people who appear in this situation may be related to local allergies, if you eat mango, may be due to the allergy of this food and lead to inflammatory irritation reaction.