Photodynamic Therapy
An in-office treatment that pairs a topical medication with blue light to clear precancerous spots caused by sun damage.
What To Expect
Your skin is cleansed, then a light-sensitizing solution (aminolevulinic acid) is applied and left on for 1 to 3 hours. You then rest with protective goggles while a blue light shines on the treated area for about 16 minutes. Most patients feel mild stinging, tingling, or warmth during the light, and a cooling fan helps.
Aftercare: avoid the sun for 48 hours after treatment, wear a hat outdoors, and use a zinc or titanium oxide sunscreen daily. Some insurance plans require trying prescription creams first.
What to Know
What It Treats
FDA-approved for actinic keratoses (precancerous lesions). It can also clear early spots that are not yet visible.
Number of Treatments
Two treatments are usually recommended for best results.
Recovery
Redness, swelling, and mild scaling are common for up to a week, depending on the amount of sun damage.