How Photodynamic Therapy Works: The Science Behind the Treatment

Are you having skin problems, such as various skin growths that may be cancerous? If so, it is time for a consultation at Catalina Dermatology. Dr. Ronald Mann, your local caring dermatologist, and his physician assistant, Troy Gustaveson, can diagnose and help treat several skin conditions.  They use many techniques to ensure healthy skin and proper care. One such treatment includes photodynamic therapy in Tucson, AZ.

What Is Photodynamic Therapy?

This therapy uses a photo sensor to attack areas like acne-causing bacteria. Your dermatologist can use it to eliminate acne or actinic keratoses of the face or scalp. This light destroys abnormal cells, which is very effective for various skin conditions. 

How Does It Work?

This involves applying a photosensitizer, which is applied directly on the skin. Your dermatologist will use a device to send light to the target area, which activates the photosensitizer. During the activation, it kills abnormal cells by producing a form of oxygen.

When used for precancerous treatment, the photosensitizer agents are applied directly to the affected area. It may take a few hours, sometimes up to 18 hours but typically 2 hours, for the photosensitization to absorb into the skin. The next part of the process involves focusing the special visible blue or red light (not ultraviolet or infrared) on the precancerous area for about 15 minutes. Patients may feel a little bit of burning or stinging. 

This is outpatient treatment, so you can go home afterward. Because of the intense light, you will have to wear special goggles during the process to protect your eyes. You can expect your skin to be slightly red and sore for a few days, as it may feel like a sunburn. Your doctor will direct you to not put anything on it for at least 48 hours. It's also best that you stay indoors to avoid sun exposure. If you must go outside, make sure you wear very protective clothing.

The affected area may scale, crest, or blister during the healing process. Any resulting scab will eventually fall off in about three weeks. Make sure you go to any follow-up appointments to ensure healing is going as planned.

When Dr. Mann or his physician assistant do photodynamic therapy in Tucson and Vail, AZ, they will ensure you understand the process. They will only use this treatment if it is right for your condition. Call the Tucson, AZ, office at 520-529-8883 or the Vail, AZ, office at 520-479-1881 to schedule a consultation.