Huntington Woods Acne: Acne is most common in teenagers and young adults. Symptoms range from uninflamed blackheads to pus-filled pimples or large, red, and tender bumps. Treatments include over-the-counter creams and cleansers, as well as prescription antibiotics. Acne is most common in teenagers and young adults. Symptoms range from uninflamed blackheads to pus-filled pimples or large, red, and tender bumps. Treatments include over-the-counter creams and cleansers, as well as prescription antibiotics.