Acne is not caused by toxins in the body, as commonly believed. The main causes of acne are hormonal changes, increased sebum production, excessive keratinization of hair follicles, and infection by acne bacteria. 

Six bad habits that contribute to acne outbreaks include touching the face unnecessarily, consuming excessive sweets, over-washing the face, improper sun protection, staying up late, and using dirty items on the face. Maintaining a clean and healthy lifestyle, such as avoiding excessive screen time and consuming fruits and vegetables, can help prevent acne.