PDT Pain Management — SCE Dermatology MCQ

Correct answer: C — Cold air/water fans during illumination, daylight PDT (which is significantly less painful than conventional PDT), nerve blocks for facial treatment, and oral analgesia beforehand

The correct answer is C: cold air/water fans during illumination, daylight PDT (which is significantly less painful than conventional PDT), nerve blocks for facial treatment, and oral analgesia beforehand. Pain during illumination is the main limiting factor in conventional PDT for actinic keratoses, driven by nerve stimulation as protoporphyrin IX is photoactivated, and a multimodal approach is recommended rather than any single measure. UK guidance from the British Association of Dermatologists and British Photodermatology Group specifically recommends daylight PDT for mild to moderate AK where pain is likely to be problematic, particularly confluent facial or scalp lesions, because it produces comparable efficacy with markedly less discomfort than hospital-based conventional PDT. Cooling fans reduce local nerve conduction velocity and heat-related discomfort, nerve blocks (for example supraorbital and supratrochlear) are useful for extensive facial disease, and pre-treatment oral analgesia addresses baseline discomfort; combining these gives the best tolerability and compliance.

Reference: https://www.nice.org.uk/guidance/conditions-and-diseases/skin-conditions