Skin Rash in Jiu Jitsu/MMA?

I have been doing grappling martial arts for the past 9 months ago. Since winter started I have noticed that my skin breaks out in a infection, my first doctor said it was scabies. I took the prescption and it cleared up. Now it broke back out. My next doctor said it was a rash from dry skin, I was told to take colder showders, use lotion and that I have sensitive skin. The rash persist but I'm wondering when it finally goes away will it stay away. Any advice.