Patients with constipation must be examined and need to be adequately examined. Due to the complexity and diversity of the mechanisms and causes of constipation, it is necessary for patients with chronic intractable constipation to complete all relevant examinations to provide a reliable basis for further treatment. Choosing the appropriate examination according to the condition is the first step of chronic intractable constipation, but most of the patients with constipation will think that they need to do certain examinations which seem to be high in technology but actually are not necessary, and they do not know about the required examinations. In order to clarify the concept of constipation-related tests and reduce the patient’s misunderstanding, we would like to introduce a few major constipation-related tests that patients may need. 1, gastrointestinal function and psychological examination: more than moderate constipation patients due to the long-term effect of ammonia neurotoxicity, will produce a mild or severe severe reaction, thus triggering a series of mental disorders, the development of serious when even cause schizophrenia, suicide invasion, so that the patient is worse than death. Therefore, it needs to be detected early and treated in time through this examination. 2, anorectal power examination: the examination is actually for the exit type of constipation, clearly test the internal rectal pressure and the anus to produce stool and defecation threshold, for the evaluation of constipation type is crucial. 3.Electronic colonoscopy: long-term constipation patients are 20 to 30 times more likely to suffer from digestive tract tumors than normal people, colonoscopy can be an early detection of colonic melanosis, intestinal polyps, intestinal ulcers and other pre-cancerous lesions. At the same time, constipation caused by tumor can also be diagnosed by colonoscopy. There was a young patient with constipation for less than a month, who was clearly diagnosed as constipation caused by tumor occupying and blocking the digestive tract after examination. 4. Lung function test: It is written in Huangdi Neijing that “the lung and the large intestine are mutually exclusive”. It has been proved that for a large part of patients, lung function is indeed correlated with constipation. Chronic constipation will affect lung function, patients are prone to asthma, pulmonary heart disease, etc., and the existence of such diseases will also aggravate constipation. 5.Colon transport examination: most patients with colon constipation have mild or severe colon power impairment, these patients usually lack of bowel movement, slow bowel movement, this test is positive to diagnose the existence of colon constipation, is to assess whether the patient needs to implement the surgical treatment of the important indications. 6, barium meal gastroenterography: originally mainly for intestinal imaging, patients with colonic constipation are likely to have a long coiled colon, intestinal prolapse into the pelvis to form a pelvic floor hernia, small bowel hernia and other organic changes, and the discovery of such a situation can help guide the development of surgical programs. Recently, many patients with long-term constipation are found to suffer from gastric disease, or even gastric disease or gastric ptosis as the primary disease, considering that the digestive function is realized by the digestive tract as a whole, this examination is expanded to gastrointestinal angiography. 7, fecography: fecography is a dynamic observation of the localization of the patient’s defecation (i.e., anorectal movement), so unlike ordinary imaging, this examination can fully detect the existence of various problems in the patient’s defecation process, such as anterior proptosis of the rectum, intestinal fecal deposits, and further according to the situation to design a treatment plan. 8, physical identification: constipation and physical close relationship, known Chinese medicine, including qi constipation, yin constipation, blood constipation, fluid loss constipation, yang constipation, spleen constipation and other types of constipation. Such a classification is based on the body as a determining factor, to determine the body can fully prevent the blind use of medication, for the fundamental problem of the implementation of physical conditioning. 9, other examination: due to the complexity of the causes of constipation, clinical may see a variety of unexpected other conditions, need to take appropriate examination according to the specific conditions.