Acne is a skin disease that involves the oil glands found at the base of hair follicles. These glands come to life during puberty due to both male and female hormones produced at that time. Because of these hormones, this is the time acne usually occurs. Acne occurs when the oil glands at the base of hair follicles get blocked and oil accumulates under the skin. Acne isn’t medical and dangerous, but it can be frustrating and embarrassing, especially for teens. It is estimated that nearly ¾ of the population between 11 and 30 will get acne. When acne flares up, it usually occurs on the face, but often can be found on the back, chest, shoulders and neck. Research shows that susceptibility to get acne may be genetic. If the child’s mother had acne, then the child is likely to have it. There are also medications that may cause acne, mainly those that contain androgen and lithium. If you’re susceptible to acne, using greasy cosmetics can cause it to flare up. During pregnancy, hormone changes may cause acne to either develop for the first time, or to recur if you had it in the past.