At the age of 13,I had ring like impressions on my skin near my leg joints...by use of medication I got rid of it...but since then,frequently on my testicles and leg joints i feel very itchy and skin used to get too scaly and intensely itchy..sometimes due to severe itching I found cuts and little bleeding too..I've a lot of public hair and i frequently use trimmer to shave in that region,but i'm unable to shave hair on my testicles and buttock joints due to this skin infection..I wear tight jeans and underwear...and i get a lot of sweat in my underwear...is that a reason for my skin abnormality? what actually is this disease? and how can i cure it? please help me