Im doing this research paper on acne and i want to know the causes of acne like hormonal wise and chemicals that we put on our face and eat and stress?

Be discerning : Despite a great deal of talk, much less is known about acne than people will claim, and much of what you read about putative causes is untrue, often simply made up. I tell people with acne to manage it rather than trying to identify and remove causes; the one exception is women who may have a hormonal problem such as poly cystic ovaries.