What should you know about photothermal and photodynamic therapy?

Photothermal treatment converts light into heat within a chosen skin target. The heat can affect unwanted pigment, blood vessels, or tissue, depending on the device and its settings. Photodynamic therapy usually involves applying a light-sensitive medicine to the skin, allowing it to interact with a specific light source. This can be used for selected sun-damaged areas and some superficial skin lesions, including certain cases of basal cell carcinoma.

Treatment choice depends on the diagnosis, depth and location of the problem, skin tone, medicines, and healing history. Photodynamic therapy can make treated skin unusually sensitive to light for a period after the session, so the clinic gives specific light-avoidance instructions.

Before treatment, tell the clinician about medicines, active skin irritation, recent tanning, cold sores, and any history of unusual scarring. Follow instructions about stopping or continuing products; do not change prescribed medicines without advice.

Afterward, use the recommended gentle cleanser, moisturiser, and sun protection. Redness, warmth, swelling, crusting, or peeling can occur as the skin responds. Do not pick flakes or crusts. Keep follow-up appointments so the clinician can check healing and decide whether further treatment or another option, such as topical 5-fluorouracil, is appropriate.

Contact the treating clinic promptly if pain is increasing rather than settling, redness is spreading, swelling is marked, or the area develops pus, fever, or bleeding that does not stop with gentle pressure. Seek urgent help for trouble breathing, facial swelling, or swelling of the lips or tongue.

Ask which target the treatment is addressing, why this light method fits its depth, how to protect your skin afterward, which changes are expected, and when the treated area should be reviewed.