Tummy ache can do colonoscopy examination, because before receiving colonoscopy examination, the examinee needs to take appropriate amount of laxatives to completely remove the metabolites stagnant in the internal intestinal tract, and some patients may also cause abdominal pain after taking laxatives, so the tummy ache does not affect the colonoscopy examination. During colonoscopy, the medical staff will use a fiber catheter to instill gas into the intestinal tissues, thus avoiding adverse symptoms such as peristaltic hyperactivity and smooth muscle contraction, which may cause the colonoscopy to be unable to proceed smoothly. For patients with abdominal pain accompanied by bleeding in the stool, it is necessary to inform the attending doctor in advance before the examination, and according to the actual situation of the patient, auxiliary examinations, such as abdominal CT examination, magnetic resonance imaging, ultrasonography, etc., will be conducted before evaluating the possibility of accepting the colonoscopy examination.