Tell him to go to his doctor and have tests run. It could be something too serious. ONce his doctor puts him on medications, then he will get better. After he gets better then he can go on rigorous kidney cleanses, teas etc. See kidney flushes and teas, Watermelon and so forth are alright in their respective way. However, they are almost useless when the person is in advanced stages of disease. Yes eating healthy will clear some of his system and stop alot of toxic overload but flushes, teas, food tend to not be strong enough on their own to clear major problems. He will have to resort to prescriptions until he is well again and then he can start the cleanses.