around my penis, sacks and till the anus, there is a grey coloured infection with a peculiar smell, when i rub my hands there it comes out like powder with a smell, sometimes it become intense and skin there become red, it started when i was 14 years old, now my age is 25, i have tried medicines like ZOLE F, BETNOVATE GM, etc, but it all gives only a temporary break,can you give me a solution to this? i have heard the name as "latrine bite"