Constipation can be considered as the presence of the following two conditions: 1, the number of bowel movements ≤ 2 times / week; 2, the effort of defecation, hard stool; 3, incomplete bowel movement. Because constipation can be a separate disease, but also may only be a symptom of a certain disease, so it should be distinguished from what causes constipation and which type of constipation is particularly important. The treatment of constipation requires a comprehensive understanding of the degree of constipation, how long, in order to better preliminary to determine what causes constipation and which type of constipation, which need to be given to a comprehensive examination to clarify the diagnosis. 1, a detailed understanding of the history and physical examination, is an important basis for the selection of constipation process. For most patients with constipation, try to use non-invasive methods to determine the type of constipation, based on empirical treatment efficacy, to verify the clinical inference. 2, the type of constipation is an important basis for the choice of treatment. Whether it is empirical treatment or treatment after further examination, it is emphasized that different types of constipation should be treated accordingly. 3. It is proposed to emphasize the investigation of the etiology of constipation in patients with alarm signs, and to emphasize the importance of determining the type of constipation in patients with intractable constipation and lack of alarm signs. 4, the proportion of receiving various means of examination: for most constipation, empirical treatment is the mainstay, for refractory constipation, further examination should be conducted, and a few patients, especially those who need surgery, need more in-depth examination. 5, such as the poor efficacy of empirical treatment, further examination in order to understand the cause and type of disease, and at the beginning of the examination did not find organic lesions, can be returned to understand the characteristics of constipation to make the type of constipation, or further constipation related to the type of examination after the treatment and so on.