Long-term chronic constipation: seek a specialist, analyze the cause and individualize the solution. Laxative dependence: gradually change stimulant laxatives to osmotic or volumetric laxatives to restore intestinal dynamics; Diabetes: control blood sugar and add dietary fiber to kill two birds with one stone; Fine diet: dietary fiber; Disturbance of intestinal environment: dietary fiber and beneficial bacteria supplementation; Psychological disorders: psychological relief and adjustment There is still a significant proportion of patients with long-term persistent constipation who need to see a specialist to discover lesions through special examinations. The doctor takes a detailed medical history; defecography; colonic transmission test; colonography; anorectal manometry; pelvic floor electromyography, etc. Reasonable diet to prevent constipation: “one”: one liter of water per day; “two”: two bottles of milk (preferably with one bottle of yogurt) per day; “three”: three servings of high protein per day (one egg, two taels of Four: carbohydrates, protein, fat, dietary fiber, a reasonable mix, forming a “pyramid”.