Topical antibiotics are also used in the battle with acne these include erythromycin, and clindamycin. These will kill the bacteria. Once the bacteria is dead the skin will clear up. Some antibiotics require a prescription, a couple are tetracycline and trimethoprime. Antibiotics are only prescribed when the acne is considered severe. Acne can come back after being treated with antibiotics. This is why it is important to start a prevention regimen as soon as possible. Most teenagers and young adults have encountered, or will encounter acne. Although this tends to be a part of growing, acne scars sometimes result from this skin condition. Acne scars can, and in many instances do, have worse effects on individuals than the acne itself- the acne scars may travel with the individual throughout the rest of their lives. More on light based treatment for acne.