Constipation is defined as difficulty or effort to defecate, poor bowel movement, reduced frequency of bowel movement, and low volume of dry stool. What to eat for constipation, we can say from both diet and medication. Diet: the diet of constipation patients to increase dietary fiber is preferred, because dietary fiber itself is not absorbed, cellulose has hydrophilic, can absorb water in the intestinal cavity, increase the volume of stool, stimulate colon peristalsis, enhance the ability to defecate. Foods rich in dietary fiber include wheat bran, vegetables (such as bamboo shoots, eggplant, spinach) and fruits (such as dragon fruit, bananas, apples). Hydration is an important way to reduce constipation, so patients should drink more water, at least 1,000 ml of water per day, with some honey in the water, but not as a substitute for drinks, especially carbonated drinks. Medication: Medication is mainly applied to patients whose diet, exercise, lifestyle habits and other adjustments are ineffective, mainly including two categories of laxatives and motivational drugs. Laxatives: Laxatives are used to stimulate intestinal secretion and reduce absorption, increase osmotic pressure and hydrostatic pressure in the intestinal lumen, and exert laxative effects. They are generally divided into stimulant laxatives (such as rhubarb, senna, phenolphthalein, etc.), salt laxatives (such as magnesium sulfate), osmotic laxatives (such as mannitol, lactulose), swelling laxatives (such as bran, methylcellulose, polyethylene glycol, agar, etc.), and lubricating laxatives (such as paraffin, glycerin). Laxatives can be selected according to the severity of the patient’s constipation and targeted. Prokinetic drugs: commonly used drugs are mosapride and etopride, whose mechanism of action is to stimulate the intestinal interosseous neurons, promote gastrointestinal smooth muscle peristalsis, promote the operation of the small and large intestine, effective for slow transmission constipation, can be used intermittently for a long time. In summary, for patients with constipation, they can first be regulated through diet and other aspects, and then choose appropriate medication if it is not effective.