All checks are normal but anal distension, may be functional constipation, neurosis and other diseases caused by patients should consult a doctor in a timely manner to clarify the cause of the disease and then carry out appropriate treatment. 1. Functional constipation: bad defecation habits, dietary fiber content is small, often sedentary and other factors caused by defecation less than three times a week, the patient will have anal distension, fecal dryness, abdominal pain and other symptoms, such people should eat more fresh fruits and vegetables, when necessary, the use of lactulose and other drugs for treatment. 2. Neurosis: all the tests are normal, but there is anal distension, may also be caused by neurosis, the patient will also have anxiety, fear, panic, loss of appetite and other symptoms, such people should maintain adequate sleep, appropriate physical exercise, if necessary, the use of diazepam, sertraline, etc. for treatment. All of the above drugs should be used under the guidance of a doctor, the current condition through the conditioning and observation, if necessary, for review.