Currently healing from Efudex treatment to face. Two spots/patches which I could see before the treatment have become more apparent and are not resolving - scaling/crusting/fading as those which look like AKs. One new spot (white and hard) has appeared. If these don't fade do you think I should request a biopsy? I have had a basal cell carcinoma (BCC) on my chest previously and squamous cell carcinoma (SCC) of the vulva. Am I more prone to these cancers if I hadn't had them before?