Light therapy

The redness and swelling that can occur with acne is caused by a type of bacteria that can be killed by exposing your skin to different types of light. Before the procedure, your doctor might apply a medication to your skin to make it more sensitive to light (photosensitizers). You might need to visit your doctor for multiple treatments.

Your treatments may use blue light, red light or a combination. More study is needed to determine the best methods for treating acne with light.

Acne bacteria can also be killed with pulsed light and heat energy. These treatments may also shrink oil (sebaceous) glands, which decreases oil production.

Possible light therapy side effects in the treated areas include:

• Redness
• Crusting and peeling
• Changes in skin tone
• Sensitivity to sunlight
• Pain