Constipation is a common disease, multi-morbidity, in recent years chronic constipation patients are increasing year by year trend. Constipation does not directly cause a threat to life, but seriously affects people’s health. Constipation accumulates in the intestine, constantly generating various toxic gases and toxins, causing intestinal environment deterioration, gastrointestinal dysfunction, endocrine disorders, metabolic disorders, poor appetite and sleep, mental tension, and can even induce tumors. The causes of constipation are as follows 1, poor habits: not to develop the habit of regular defecation, so that the defecation reflex is inhibited; diet is too fine less slag, lack of food fiber, so that the volume of stool is reduced, increased viscosity, slow movement in the intestine, excessive absorption of water; insufficient intake of liquid; obesity, inactivity, lack of locomotor stimulation to promote the movement of feces. 2, the role of drugs: the main antacids containing calcium, aluminum, narcotic analgesics, anticholinergic drugs, anticonvulsants, antidepressants, barium sulfate, bismuth, diuretics, drugs for Parkinson’s disease, ganglion blockers, blood supplements, etc. Abuse of laxatives is very common in the constipation population, long-term use of laxatives can cause drug dependence, once stopped, it is difficult to restore normal bowel function, and can even cause colon melanosis, which is a disease that may cause increased chances of colon cancer. 3.The effect of certain diseases: general debilitating diseases; anal disorders; colon lesions such as tumor, inflammation, stenosis or diverticulosis; neurological disorders such as paraplegia, hemiplegia, etc.; mental disorders such as anxiety or depression, dementia; endocrine diseases such as hypothyroidism; metabolic disorders such as hypercalcemia, hypokalemia, dehydration, diabetes, uremia, etc. 4, age-related changes: simple constipation is more common in the elderly, and its occurrence is related to the weakened tone and peristalsis of the intestinal tube, decreased sensitivity of the rectal mucosa, and low tone of the muscles involved in defecation. Dietary contraindications Foods that help defecation: spinach, sesame oil, potatoes, honey, walnuts, sesame seeds, water chestnuts, jellyfish, mulberries, white radish, etc. Contraindicated foods: avoid consuming foods containing too much protein and calcium such as dairy products, lean meat, fish, shrimp skin, egg yolk, puffed eggs, beans, kelp, nori, etc.; avoid eating too fine and partial diet; avoid smoking, alcohol and spicy stimulating foods, especially strong tea; avoid eating more sugar; avoid flatulence and indigestible foods such as dried beans, onions, white potatoes, etc.; avoid abusing laxatives.