I applied Floruouroplex and I developed ulceration, and weeping turned crusty pus formations over several days. The crust appears and the weeping dissolves the crust and the crust continues to reappear. It's been a week now and the cancer area is still raw and painful. Should I keep using fluorouroplex despite the rawness, ulcerization and pus forming? I am a male in my seventies with no STD's and am not active sexually.