Hello! Few weeks ago I wrote about my problem in other forum, but there was not helpful answer, so I will try again. Starting from November last year, I notice that after all fluids that I'm drinking everyday, example drinking 3 liters per day, but only about 500 ml is coming out. It was something unusual, cause before all what I intake, almost the same I pee out. Of course I suspect something is not right and soon visited doctors. All results showed that there is nothing wrong with me and even doctors did not have any reasonable answer what could be the cause. Urine is always light, clean. There is no other signs, no weight gain, nothing, except reduced amount of urine. It goes like this not everyday. Example, week I can go normally, but then it can be week that I hardly pee. I just don't know what is wrong. I already visit doctors them and they could not find the cause. (I'm 21 years old male) Thank you!