Symptoms of constipation: The main symptom of constipation is difficulty in defecation. In those who have been ill for a long time, the frequency of defecation and the volume of defecation are reduced due to loss of appetite or fear of defecation, which may vary depending on the type of constipation. In the colon type constipation, such as slow transmission type constipation, manifested as a lack of stool, stool times less, most less than 3 times a week; and rectal anal type constipation, such as functional outlet obstruction type constipation, the stool is frequent, but difficult to discharge, can be said to want to stool, want to stop more than. Patients with chronic intractable constipation, due to the long-term use of large amounts of stimulant laxatives, such as rhubarb, senna, etc., will produce drug constipation, called “laxative abuse syndrome”. Patients may experience abdominal distension, abdominal pain, and psychiatric symptoms such as anxiety, irritability, insomnia, depression, and even personality changes. The authors have encountered a few patients who, after failing various medications and surgical treatments, had thoughts of dying because of constipation, which shows that patients with constipation are in extreme pain.