The most common causes of recurrent acne on the face are diet, environment and psychological factors.1. Diet: Long-term consumption of high-fat, high-sugar, spicy and irritating foods and alcohol will cause recurrent acne.2. Environment: This refers to special exposure to the environment, such as chemical substances, radioactive substances, etc.3. Mental: Mainly long-term psychological stress, mental tension, poor sleep and late nights will cause recurrent acne.4. 4. Other aspects: There are specific groups of people who take long-term oral medications, such as isoniazid, corticosteroids, etc., which can also cause recurrent acne. In short, the above-mentioned causes all lead to endocrine disorders, high androgen secretion, and blockage of hair follicle sebaceous ducts, and acne will be formed.