Thanks for posting your query.
Is he getting watery diarrhea/ nausea
and vomiting/ frequent urge to use washroom?
Is he able to pass stools and flatulence?
Is he getting bleeding per rectum?
With the available described symptoms, there appears to be possibility of acute gastroenteritis
or blockage of stents.
Presence of spasmodic pain suggest the possibility of gastroenteritis.
You should consult with internal medicine specialist and should go for thorough check up.
presence of abdominal sounds may helps in ruling out possibility of blockage of stents as intra abdominal pathology may be associated with absence of bowel sounds.
He should go for ultrasound
imaging studies of abdomen along with color doppler for evaluation of blood flow in stents.
treatment depends on the diagnosed disease.
Meanwhile he should take antispasmodics along with tramadol
for relief of pain.
Dr. Mayank Bhargava