Zits were a facial affliction which affected most Human teenagers. While not fatal or life-threatening, zits did cause some embarrassment, as they were often prominent on the face as either red or white blotches. There was no known cure for this condition, although there were several means of decreasing the number and severity of the blotches. Most humans outgrew the condition by about age twenty. If highly irritated, however, they could leave scars.
- Acne on Wikipedia