I had a kidney stone stuck in the canal and was causing this condition.... eventualy it got out ... took like three months... the kidney was not happy in the time... but this is a temporary condition ... your is a bit more complicated.... still what I have learned in the period, reading a lot of stuff is that nothing is 100% certain with medicine, biology, biohemistry, etc ... there is just a millions hemical reactions happening in our bodies and we cant put our finger on it