Persistent or cumulative for at least 12 weeks in the past 12 months with 2 or more of the following symptoms: □ 4 bowel movements at least once with excessive straining □ 4 bowel movements at least once with a sensation of poor evacuation □ 4 bowel movements at least once with a hard, peduncled or pelletized stool □ 4 bowel movements at least once with a sensation of anorectal obstruction or obstruction □ 4 bowel movements at least once with the need for manipulation □ Stool movements of fewer than 3 times per week with a daily volume of stool Less than 35 grams No loose stools are present and do not meet the diagnostic criteria for IBS. Treatment Principles of drug selection for constipation On the one hand, appropriate laxative drugs should be selected according to the etiology, type and degree of constipation; on the other hand, the principle of less toxicity, side effects and drug dependence should be followed, and the commonly used ones are such as bulking agents (e.g., wheat bran, ocimum basilicum, etc.) and osmotic laxative agents (e.g., polyethylene glycol 4000, lactulose, sorbitol). For slow-transmission constipation, prokinetic agents, such as cisapride or mosapride, can also be added. It should be noted that in patients with chronic constipation, long-term application or abuse of stimulant laxatives such as senna, rhubarb, castor oil, aloe vera, phenolphthalein should be avoided. For patients with fecal impaction, clean enema once or combined with short-term use of stimulant laxatives to release the impaction. After release, bulking agents or osmotic medications are then used to keep the bowel movement open. Capsaicin and glycerin suppositories have the effect of softening the stool and stimulating defecation. Compound keratine acid can be effective in the treatment of constipation of hemorrhoidal origin. How to prevent habitual constipation: 1, the diet must have the right amount of fiber. 2, every day to eat a certain amount of vegetables and fruits, such as 1 hour before meals to eat bananas 1-3. 3, the staple food should not be too fine, to eat some appropriate coarse grains. 4, morning fasting drink a cup of light salt water or honey water, with abdominal massage, can strengthen the laxative effect. All day should drink more cool water to help laxative. 5, appropriate physical activity, strengthen physical exercise, such as supine leg bends, squatting and standing, cycling, etc. can strengthen the abdominal movement, promote gastrointestinal peristalsis, help promote defecation. 6, develop the habit of regular defecation. 7, keep in a good mood, life should be regular. Help improve constipation six kinds of food: 1, ripe bananas 2, walnuts 3, grapefruit, grapefruit 4, sweet potatoes 5, brown rice 6, apples