Photodynamic Therapy

This information is useful for adults and older adults
A woman sits in front of a device as she receives photodynamic therapy

Credit: Robert A. Lisak

Sun damage can sometimes be undone. A technique called photodynamic therapy directs wavelengths of blue fluorescent light to activate a topical medicine applied to the skin. It selectively kills abnormal, potentially cancerous cells in specific areas. 

“It’s a very effective way to treat a broad area of sun damage,” says Sean Christensen, MD, PhD, a Yale Medicine dermatologist. Photodynamic therapy procedures can be performed in one visit, though some patients require more than one treatment. “There isn't any surgery involved—no needles, either,” Dr. Christensen says.

Listed among the best dermatologists in the country, Yale Medicine dermatologists receive thousands of referrals each year from dermatologists and physicians throughout Connecticut and beyond to care for patients. At Yale Medicine, we tailor treatment to your individual needs.