Persistent Skin Rash from Cat Scratch

I got this skin rash from my cat who scratched me on my leg. He was in the dirt and picked up what the dr. said was ring worm. I was 14 when I I got it. I’m 21 now and still have it. It goes away with cream but when I stop putting cream it comes back. I tried putting cream on the same areas even after it goes away and after doing so for maybe 4 weeks and stopping it still finds a way to come back but takes longer. I also bought a tea tree soap and it works sometimes. I have the rash in areas that are embarrassing and I really want it to go away for good. I don’t know what to do.