What Causes Blood In Urine And Stomach Pain?

I HAVE A QUESTION ABOUT MY SON HE S 30 HEAVY DRINKER HE TIOLD ME THAT HIS URINE HAS BLOOD AND HIS FECES IS BLACK HIS STOMACH HURTS AND HE CAN T EAT TO MUCH HE SAYS HE STILL BE HUNGRY AND THE ONLY WAY HE CAN EAT A FULL MEAL IF HE HAS SOMETHING TO DRINK THEN HE CAN EAT HIS BACK HURTS AND ALSO HURTS AROUND HIS KIDNEYS WHAT SHOULD I DO AND HE SMOKESb