It is normal to have short-term bowel irregularity after colonoscopy. If you have long-term bowel irregularity after the examination, it may be related to the disease itself. Doing colonoscopy before the doctor will use some drugs such as compound polyethylene glycol electrolyte dispersal and other drugs, the drug will promote intestinal emptying stool to achieve the purpose of intestinal cleansing, the use of drugs will appear after the diarrhea, stools do not form and other symptoms, so the short-term stools do not form after the colonoscopy is normal. When doing colonoscopy, due to the colonoscope for the metal probe, from the anus into the intestinal tract, may be on the intestinal wall mucosa caused by some impact, thus appearing colonoscopy after the short-term stool is not shaped. If the cause of unshaped stool after colonoscopy appears for a long time, it may be related to its own disease, such as irritable bowel syndrome, ulcerative colitis, etc., which can lead to unshaped stool for a long time after the examination. After the colonoscopy stool is not shaped, should be further medical treatment, by the doctor to clarify the cause of the disease, such as pathology need to take medication under the formal guidance of the doctor.