It can take up to a few days of eating solid foods to produce a normal bowel movement after a colonoscopy, according to Colon and Rectal Surgery Associates. A bowel movement after the colonoscopy depends upon a person's normal habits as well as diet, states Digestivehealth.net.
It is not uncommon to pass some blood with the initial bowel movement after the colonoscopy, Mayo Clinic states. However, if blood or blood clots are persistent, it is important to notify a doctor.
The first bowel movement after procedure may consist of diarrhea or loose stools, states Burlington County Endoscopy Center. Sometimes a colonoscopy can cause bleeding from either removing polyps or from colon perforation, which happens to about one of every 500 to 1,000 patients.