Basic information description A chronic inflammatory (red and sore) skin condition that is most common in teenagers. The skin eruptions may appear on the face, chest, and back. Acne is more common in males than in females. frequent signs and symptoms Blackheads (black spots the size of a pinhead). Whiteheads (white spots similar to blackheads). Pustules (small pus-filled lesions). Redness and inflammation around eruptions. If acne is severe, cysts (larger, firm swellings in...