Hi, my Dad, 61, has a sharp constant pain in the lower eleft side of his abdomen. I t will likely dissapear in a few days. He has had it before about one year ago (at that time they suspected obstruction as he had not been to the toilet). This time he stopped eating and drinking when the pain began but the pain got so bad he went to hospital at midnight. Since he had been to the toilet at about 8am that day, they said there cannot be a blockage and basically sent him home to rest with no tests or investigation taking place. He also fainted on the way to the hospital and now two days later he is still feeling weak and tired. When he was 17 he had an ulcer which was operated on. The pain he feels is close to the scar from that. Could you tell me what investigative procedures he should be requesting as no one seems to be investigating anything. Thank you