Photodynamic Therapy (PDT) for Field Treatment of Actinic Keratosis in Ft. Lauderdale

In Fort Lauderdale, year-round sun exposure can leave a lasting imprint on the skin, especially for residents, seasonal visitors, boaters, golfers, runners, and anyone who spends meaningful time outdoors. One common result is actinic keratosis, often called AK, which can appear as rough, scaly, or gritty spots on chronically sun-exposed areas such as the face, scalp, ears, chest, forearms, and hands.

Photodynamic therapy, or PDT, is one field-directed option dermatologists may use when there are multiple actinic keratoses or a broader area of visible and background sun damage. Rather than treating only one isolated spot, field treatment is designed to address a wider area of concern after a dermatologist evaluates the skin and determines whether PDT is appropriate.

Quick answer

• PDT may be considered for actinic keratoses and surrounding sun-damaged skin, often called a treatment field.
• The process typically involves applying a light-sensitive medication to the skin, allowing it to absorb, and then activating it with a specific light source in the office.
• It is not a substitute for a full skin exam, biopsy when needed, or dermatologist-guided diagnosis.
• After PDT, treated skin may be red, tender, crusted, or sensitive to light for a period of time that varies by person.
• In South Florida, ongoing sun protection and regular dermatology follow-up are especially important after AK treatment.

What photodynamic therapy is

Photodynamic therapy is a medical treatment that combines a topical photosensitizing medication with a controlled light source. The medication is applied to the treatment area and given time to absorb. When the light is applied, it activates the medication in targeted abnormal cells and sun-damaged skin. Your dermatologist can explain the specific medication, light source, preparation steps, and aftercare instructions used in the office.

For actinic keratosis, PDT is often discussed as a field treatment. A field is an area of skin with visible AKs and surrounding sun damage that may not yet be obvious to the eye. This is one reason PDT may be considered for areas such as the face or scalp when there are multiple rough or scaly spots rather than one single lesion.

Common causes or triggers

Actinic keratoses are most often associated with cumulative ultraviolet exposure over time. In a sunny, outdoor region like Fort Lauderdale, that exposure can come from everyday activities as well as years of beach, pool, boating, sports, or travel-related sun.

• Long-term ultraviolet exposure from the sun
• Past sunburns, especially repeated or intense burns
• Outdoor work, sports, boating, or frequent recreation
• Fair skin, light eyes, or a tendency to burn, though AKs can affect many skin types
• Use of tanning beds or other artificial UV exposure
• A weakened immune system, which may increase skin cancer risk and should be discussed with a physician

What you can do at home

Home care cannot diagnose or remove actinic keratoses, but it can support healthier daily habits and help reduce additional UV damage. The most important step is consistent sun protection, especially in South Florida where incidental exposure can add up quickly.

• Use a broad-spectrum sunscreen daily and reapply as directed, especially when outdoors.
• Wear a wide-brimmed hat, UV-protective clothing, and sunglasses when possible.
• Seek shade during peak sun hours when practical.
• Avoid tanning beds.
• Do not pick, scrape, or attempt to remove rough spots at home.
• Monitor spots that are changing, bleeding, painful, rapidly growing, or not healing, and schedule a dermatology visit if you notice these changes.

Professional options

A dermatologist can evaluate whether a spot is consistent with actinic keratosis, whether a biopsy is needed, and which treatment category makes sense for the pattern, location, thickness, skin type, medical history, and patient goals. Common professional options for AK may include lesion-directed treatment, field-directed therapy, or a combination approach.

• Cryotherapy: A lesion-directed treatment often used for individual AKs.
• Prescription topical medications: Field-directed options that may be used at home under physician guidance.
• Photodynamic therapy: An in-office field treatment option that may be considered for broader areas of sun damage and multiple AKs.
• Biopsy: Recommended when a lesion has features that need closer evaluation or when diagnosis is uncertain.

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

When to see a dermatologist

Because actinic keratoses are related to sun damage and may be associated with skin cancer risk, it is worth having rough, scaly, persistent, or changing spots evaluated by a board-certified dermatologist. This is especially important if a spot is tender, thick, bleeding, crusting repeatedly, growing quickly, or not healing.

A dermatologist can perform a skin exam, determine whether a biopsy is appropriate, and discuss treatment options based on the full clinical picture. For people who spend significant time in Fort Lauderdale or travel between sunny climates, a regular skin check schedule can also help track new or changing lesions over time.

FAQ

Is PDT used for one spot or a larger area?

PDT is often used as a field treatment, meaning it may address a broader area of sun-damaged skin rather than only one isolated spot. Your dermatologist can determine whether the pattern of AKs makes PDT a reasonable option.

Does PDT replace a skin cancer screening?

No. PDT is a treatment option, not a diagnostic exam. A dermatologist should evaluate suspicious, changing, bleeding, painful, or non-healing lesions and may recommend a biopsy when needed.

What can the skin look like after PDT?

After treatment, the area may look red, swollen, crusted, flaky, or sunburn-like, and it may feel tender or sensitive. The intensity and duration vary by person, treatment area, and protocol, so your clinician will give aftercare instructions.

Why is sun protection so important after treating actinic keratosis?

AKs are strongly linked with cumulative UV exposure. Treating existing areas does not prevent future sun damage, so sunscreen, protective clothing, shade, and routine skin checks remain important.

Can seasonal visitors schedule PDT while in Fort Lauderdale?

Seasonal visitors can discuss timing with the office, especially because PDT may involve preparation, a treatment visit, light avoidance instructions, and follow-up planning. Your dermatologist can help decide whether timing fits your travel schedule.

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.

Sources & further reading

• American Academy of Dermatology (AAD) – Actinic Keratosis Clinical Guideline
• The Skin Cancer Foundation – Actinic Keratosis Treatment
• DermNet – Photodynamic Therapy