Photodynamic Therapy for Sun Damage

Sun damage can build quietly over years, then show up as uneven tone, rough texture, or stubborn sun spots. Photodynamic therapy (PDT) is one science-forward option your dermatologist may recommend to address certain visible signs of sun exposure and sun-related skin changes.

Quick answer

• PDT combines a topical light-sensitizing medication with a controlled light source in-office.
• It may help improve overall sun-damaged skin and treat select sun-related rough spots (often called actinic keratoses).
• Downtime varies, but temporary redness, peeling, and light sensitivity are common.
• It is not one-size-fits-all, so an evaluation helps confirm whether PDT is a reasonable option for your skin goals.

What it is (plain English)

Photodynamic therapy is an in-office treatment that uses two steps: first, a dermatologist applies a prescription topical solution to the skin. This solution is absorbed more by certain sun-damaged or abnormal cells. After a set waiting period, the area is exposed to a specific light. The light activates the solution and creates a targeted reaction in the treated skin. The goal is to treat the intended sun-related changes while supporting healthier-looking skin over time.

Common causes and triggers of sun damage

• Daily incidental UV exposure (walking, driving, outdoor errands)
• Intense intermittent sun (vacations, boating, beach days)
• Tanning beds or deliberate tanning
• Living or spending time in high-UV environments (including coastal, tropical, or high-altitude areas)
• Not using broad-spectrum sunscreen consistently, or not reapplying
• Older sun exposure catching up with the skin as collagen and repair processes slow with time

What you can do at home

At-home care cannot replicate in-office PDT, but it can support the appearance of sun-damaged skin and help prevent new damage.

• Use broad-spectrum sunscreen every morning: Choose SPF 30 or higher and apply to face, ears, neck, and chest. Reapply when outdoors.
• Add physical protection: Wide-brim hats, UV clothing, and seeking shade can make a noticeable difference over the long run.
• Keep your routine simple and consistent: A gentle cleanser, moisturizer, and sunscreen is a strong foundation, especially if your skin is reactive.
• Support your skin barrier: If your skin feels tight, stings easily, or flakes, focus on moisturizing and fragrance-free products before adding multiple actives.
• Be careful with strong exfoliants: Over-exfoliating can increase irritation and make discoloration look worse. If you are unsure, a clinician can help you choose a safer plan.

Professional options

Professional care can be helpful when sun damage is widespread, persistent, or paired with rough, scaly sun spots that need a closer look. Options vary based on your skin type, your goals, and what your dermatologist sees on exam.

• Photodynamic therapy (PDT): Often used for field treatment of sun-damaged areas, and can be used to treat certain sun-related rough spots.
• Prescription topicals: Some creams or gels may be used to address sun-related skin changes. Your dermatologist can guide safe use and expectations.
• Chemical peels: Can help improve tone and texture for some patients, with a range from lighter to deeper options.
• Light and laser-based treatments: May be used to target redness, discoloration, or texture, depending on device type and suitability.

At Waverly DermSpa, we offer Photodynamic Therapy (PDT) and can help you understand whether it may be appropriate.

When to see a dermatologist

Sun damage can look like many things, and some changes should not be self-treated. Consider a dermatologist visit if you notice any of the following:

• A spot that is new, changing, or not healing
• Persistent rough, scaly patches that keep returning
• Rapidly growing, tender, bleeding, or crusting areas
• A mole that changes in shape, color, or size
• Widespread sun damage that is affecting your confidence or comfort

FAQ

Is PDT only for the face?

No. PDT is commonly used on the face, but it may also be used on other sun-exposed areas such as the scalp, ears, neck, chest, and hands, depending on what is being treated.

What does PDT feel like during treatment?

Many people describe warmth, stinging, or a burning sensation during the light portion. Comfort strategies can be used in-office, and your clinician can talk you through what is typical in your specific plan.

How much downtime should I plan for?

Downtime varies. Redness, swelling, peeling, and a sunburn-like feeling can occur, and some people are more reactive than others. Your clinician can give guidance based on the treated area and the protocol used.

Will PDT remove all sun spots or reverse all sun damage?

PDT may help improve certain signs of sun damage, but outcomes vary and it is not a guarantee. Some concerns respond better to other treatments, or to a combined approach that your dermatologist can tailor to your skin.

Disclaimer

This article is for educational purposes and is not medical advice. For diagnosis and personalized treatment, please book an appointment with a board-certified dermatologist.