Acute constipation: short duration, mostly related to diet, emotions, water and soil changes, etc. Solutions: 1, simple treatment such as open plug, soap head, enema, etc.; 2, with diet regulation: banana, sesame oil, dietary fiber, etc.; 3, appropriate with drugs: stimulating laxative short-term use to improve the symptoms; 4, seek medical help. Dietary fiber and constipation: soluble dietary fiber characteristics: strong water absorption and swelling function, dietary fiber can absorb water equal to several times its own weight, absorb water and swell in the gastrointestinal and form a high-viscosity sol or gel, so that people produce a sense of satiety and inhibit eating, adsorb harmful substances. It is fermented by beneficial colonic bacteria, regulates intestinal PH, improves the reproduction environment of beneficial bacteria, promotes the colonization of bifidobacteria and other beneficial intestinal flora, improves the nutrition of colonic mucosa, loosens stools and enhances intestinal peristalsis. China’s Nutrition Society recommends: the appropriate intake for adults is 30 grams per day, while the average daily dietary intake of the elderly is only 6 grams, far from the actual physiological needs. After clinical observation, elderly patients with chronic constipation improved significantly.