I have had odour & slight itching for about 2 years now the odour is mostly between bum cheeks and its really getting me down I have been tested for STI’s and BV which keep coming back negative I only wash with water I hardly have sex with my boyfriend so it cant be caused by that i just don’t know what to do 
has anyone experienced the same or have any advice please? thank you x
if its in your bum it could be anal glands , of its not a yeast infection it could be PH imbalance. try a ph balanced soap .