PDT involves applying a photosensitive cream to the affected area. After approximately three hours, a red light is applied to activate the cream. This process treats only the abnormal skin cells, leaving healthy cells largely unaffected.
Benefits of PDT
- Rapid healing due to minimal damage to healthy skin.
- Minimal scarring.
- Treatment can be repeated if needed.
- Does not limit future treatment options.
Possible Drawbacks
- The cream must remain on the skin for around three hours to ensure proper absorption.
- Mild discomfort may occur during or after treatment (local anaesthetic is available if required).
- Around 75% of lesions require a second treatment; occasionally a third may be needed.
What Happens During Treatment?
1. Cream Application (Morning)
- Staff will gently remove any crusts on the lesion to allow deep absorption of the cream.
- The cream is applied and the area is covered with a light-proof dressing.
- You will be asked to return after approximately three hours.
- You may stay in the hospital or leave and return later.
2. Light Application (Afternoon)
- You will be seated or positioned comfortably.
- The dressing and remaining cream will be removed.
- Local anaesthetic may be given.
- A red light is shone on the treated area for 8–20 minutes.
- If treatment is close to the eyes, protective shields will be used.
- Tingling sensations may occur; if severe, more anaesthetic can be given.
- A dressing is applied afterwards.
Aftercare When You Return Home
- Keep the dressing on until at least the following evening (ideally 48 hours) to protect from light.
- Mild discomfort may persist for a few days.
- The area may crust over – this is normal. Do not pick at it.
- Pinkness, swelling, or slight oozing may occur and should settle within a few days.
- After 24–48 hours, normal washing is fine; gently dab the area dry.
- Avoid swimming until the area is fully healed.
If you have any questions about your appointment, please phone the department at 01786 434098 (Stirling) or 01324 566509 (Larbert).