please help my grandad.

my grandad has crohns disease hes had it since i was 4 an not had much rest from illness since,recently hes been experiencing alot of pain in the area on and around his sternum he is vomiting alot which has caused him to drop below 9stone the pain comes whenever he eats,he gets jaundise alot, he as also passed 2 pebble shaped stones the size of a thumb nail which came through his bowel into his stomer bag they were dark brown in colour,the pain an ill feelings subside once they come away from him. please can someone shed some light on what to do as i fear for his life i just want him tobe happy and well again.thanks sarah.