Colonoscopy does not necessarily detect constipation because there are very many causes of constipation, such as functional bowel disorders like irritable bowel syndrome, where the patient has no obvious abnormalities in the intestines but still suffers from constipation. Colonoscopy is the most commonly used examination in gastroenterology, which allows direct visualization of the mucosa of the intestinal cavity and is mainly used to clarify the presence of intestinal lesions such as polyps and adenomas, which can then be treated symptomatically. If you want to check constipation, it can be determined by abdominal examination. If defecation is impaired, rectal examination can be performed to determine whether there is mud-like stool, which predicts the presence of constipation in patients. Gastrointestinal X-ray is often used clinically to determine the presence of intestinal obstruction, which can lead to constipation; anorectal manometry can also be used to assess the presence of power and sensory dysfunction of the anal sphincter and rectum; fecography can be used to detect the presence of intussusception, outlet obstruction type constipation, etc.; balloon force-out test can be used to assist in checking whether the sensation of the rectum is normal, and when the patient is constipated, the above When the patient is constipated, the above test results may be abnormal. Patients with constipation should adjust their diet, supplement dietary fiber, eat more fruits and vegetables such as pears, apples, radishes, etc. It is recommended to consume coarse grains and drink at least 1.5-2L of water daily to increase the water content in the stool and make the discharge easier. Moderate increase in exercise and establishment of good bowel habits can relieve constipation.