Acne is really a catchall term for a variety of symptoms such as pimples, whiteheads, and blackheads. It’s a condition where the pores of the skin become clogged and the person gets inflamed and noninflamed lesions. So what is the cause of all the clogging? “chocolate doesn’t cause acne” Dirty hair or skin doesn’t cause acne. Sex, either too much of it or lack of it, doesn’t cause it either. So what does? Heredity – at least for the most part.