Hello you boyfriend is suffering from staled food intake , which has cause him git infection , it is better to avoid all spicy foods aerated drinks just ask him to very bland diets with lot of water intake , ask him to take some fibrous fruits like apples etc , stop eating all snacks, just see your doctor if problem persist have
ultrasound of abdomen .Pls do let us at dr2uonline@yahoo.co.in to solve the case by homoeopathy