Although it is viewed and believed as a teenage affliction, a great percentage of adults struggle with acne. In fact, certain medical reports have noted that acne generally affects 25 percent of all adult men and 50 percent of all adults at some points in their adult lives.

Just like the normal acne, there are some driving factors that cause adult acne. One of those is the contact with an oily substance like the vegetable oil, mineral oil, or even petroleum oil. According to some studies, adult acne may also be caused by particular steroids and medications.