But accumulative sun exposure — not just sunburn — can also be a risk factor for BCC and squamous cell carcinoma. A trial last year, published in Dermatologic Therapy, comparing Efudix to daylight PDT found that Efudix was slightly more effective, clearing 93 per cent of lesions compared to 80 per cent with daylight PDT. If it becomes painful or inflamed, this can be a sign it is transforming into a squamous cell carcinoma. So if someone comes in with an actinic keratosis, they often freeze it off there and then. If I hadn’t had it done I might have been at risk of further skin cancer.

Source: Daily Mail May 20, 2019 21:14 UTC