The causes of sideburns acne include personal cleansing and care factors, endocrine factors, lifestyle factors, mental factors and so on. 1. Personal cleansing care factors: if a person does not wash his face for a long time, the accumulation of oil and grease will block the pores, which can trigger the appearance of acne. 2. Endocrine factors: If the patient has high androgen activity, androgen can stimulate the secretion of oil, which can also lead to sideburns acne. 3. Lifestyle factors: when patients eat spicy, greasy food for a long time, oil secretion increases, will also grow acne. Often stay up late can also lead to acne. 4. Mental factors: if the patient has depression, schizophrenia and other diseases, these diseases can infect the endocrine system, resulting in increased oil secretion, triggering acne. Cause sideburns long acne may have other reasons, please go to the hospital in time to check, clear cause for targeted treatment, do not blindly deal with.