I Have Had This Open Wound For At Least Two

Question : I have had this open wound for at least two mo. now. I believe it started when i had eczema,( and i hope thats the way its spelled,) two or three mo. ago. it started on my arms, after it cleared up on my arms, it started on my right leg,down by the foot and up about six or seven inches and about a third around. I have seen two doctors , both internist at different mo. They both told me to put a good brand cream on it and wrap the leg. the creams had alcohol in them and it burnt ,so i would wipe that off and try other ointments and when i would wrap my leg it would feel nice and warm. The next day it would start burning really bad so i started pulling the hard crust off of my leg and it would get bloody , i would clean that up with bath room tissue and apply more ointment , re-wrap the leg and go to bed. The next day it would all start again. My question is this---- do you have any thoughts about what i should or could do for my leg, i'm worried i might get it infected but i don't stop either. would a hyperbaric unit help me . thank you for your time.