Anorectal manometry is a non-invasive and accurate method of computerized testing of bowel function, which is an important guide for the diagnosis and treatment of patients with abnormal bowel movements. For example, it can help you find the most direct cause of constipation, diarrhea, fecal incontinence, poor or painful bowel movements, etc. During the test, a thin catheter with an expandable balloon is inserted into the rectum, and a computer is used to obtain physiological indicators to determine whether your bowel movements are normal. Before the test, you only need to stop taking gastrointestinal motility medications for 72 hours or more and empty your bowels, if necessary, we will assist you to do so. During the test, you will be instructed to retract, relax, cough and strain your bowels for about 15 minutes without any pain. After the measurement, the doctor will determine whether you have abnormalities such as: paradoxical movements during defecation a very common form of functional constipation (Hirschprung’s disease), too large or too small rectal sensory thresholds (too large in patients with chronic constipation due to prolonged stool storage, or too small in patients with irritable bowel syndrome), and reduced protection against increased abdominal pressure. If you have a history of rectal or anal injury or surgery, local functional evaluation can be performed to understand the extent and location of the injury and to guide the next step of treatment.