For a long time, acne was considered a problem for teenagers to deal with. It seems that acne and teens go hand in hand. It is almost a cliché of the teenage years. In fact, adult acne is also a very common problem. Many adults suffer from a variety of skin problems. Pimples are not just a problem of the young. People over the age of 25 have issues with acne, too. While adult acne occurs in both men and women, it tends to be more prevalent in women. The statistics suggest that 50% of all adult women have acne, as compared to only about 25% of adult men. Adult acne affects people from every ethnicity and background. There are many causes of adult acne. Since the main cause of pimples is hormones, which is probably why women tend to have more zits and skin problems than men. Other things also cause acne. These can be things like overactive sebaceous glands that allow an excess of oil to be secreted onto the face, clogged pores, etc.