I have rash on top of my feet and side of my calf's. Dry & itches a lot. Had for 5 years.?

I have seen a general practioner, who referred me to a foot specialist, who referred me to a skin specialist. Been checked for sugar and funguses, none of those. Best guess is that I was burned by some chemical. Gave up on doctors, the last one was rude. The different ointments didn’t help with the itching or healing. A little portion of my calf’s have healed, skin feels normal, except has a dark look to it. I have had it for about 5 years, started after I lived in my new home for about a year. I use bag balm to relief some of the pain I cause from tearing my skin up from itching. Use it twice a day, after a shower it gets so bad that within a few minutes my skin dries so fast it turns white and very sore. Any help or ideas would be welcomed, Thank You|||use safflower oil and go to a dermatologist|||try holding a clean rag soaked in vinegar on area for as long as you can stand it. It may be painful but may help in the long run.