For the treatment of functional constipation, it is necessary to improve the lifestyle, increase the intake of dietary fiber, the recommended daily intake of dietary fiber is 25-35g, increase the intake of water, the daily intake of water is 1.5-2.0L, moderate exercise, establish good defecation habits, it is recommended to try to defecate within two hours after waking up in the morning or after eating. It is recommended to try to defecate within two hours after waking up in the morning or after eating, to concentrate on defecation, to develop a good defecation reflex, and to use relevant specialist medications if necessary. For patients with mild constipation, wheat bran, psyllium, and lactulose can be used. Stimulant laxatives such as phenolphthalein tablets are recommended for short-term application as much as possible and are not suitable for long-term application.