 The relationship between cigarette smoking and acne severity is unclear and remains a point of debate. Due to the observational nature of the evidence obtained from epidemiological studies, there are concerns that bias and confounding may have influenced the results. Certain medical literature reviews have stated cigarette smoking clearly worsens acne whereas others have stated it is unclear whether smoking is unrelated to, worsens, or improves acne severity. Due to the various known negative health effects of cigarette smoking, it is not recommended as an approach to improving the appearance of acne.
