I have an oastomy from colon cancer in nov. i get cramps and have bowl movements that look like puss and smell bad. run temp of 75 what is the cause?

That's not normal: The fever is the worrisome part. It is possible that you have a chronic abdominal infection from the surgery. An abscess may drain through the colon and out the ostony. That is why there is pus in the stool. That would be rare but only plausible explanation. Chronic colitis may cause this too but would be associated with abd pain too. Reccomend surgical consult and ct scan.