I am a 77 yr male who was diagnosed with polycythemia over 15 yrs ago. Have been taking hydroxurea that time to keep down the platelet count. During the past 5 years I have had 3 ulcers on various parts of both feet. They have taken over a year to heal in most cases. I now have a large venous ulcer which wraps around the back of my tendon slightly below the ankle. It started out slowly from no apparent injury and grew in size (about a month ago). I am using vigilon and have also used silvadene. There is no infection and the ulcer is shallow. A yellow film has covered the area Should I use santyl to clear off the "scum" and allow granulation? When it is removed what do u apply as a dressing so that it does not reappear? Is Oasis an option for helping grow new skin? I might alsoadd that i had a doppler test last week and passed according to the technician. Now this is my biggest question at this point. What can be used for the constantlyburning sensation that I feel most of the time(i'm losing a lot of sleep) I read in one old posting of an rx ointment used mainly for burns which helped, but the name not given. Also, there is wound care facility here in Tulsa (Tulsa Wound Clinic). Can you recommend anyone in this area?