Teenagers’ constipation is mostly caused by functional diseases such as irritable bowel syndrome, etc. It can be treated by improving lifestyle habits, using medication such as mosapride and lactulose, or assisted by devices under the guidance of doctors. 1. Improvement of living habits: Teenagers with constipation should improve their dietary structure, eat less spicy and stimulating food, increase exercise and water intake, which can stimulate intestinal peristalsis and promote defecation, as well as develop good defecation habits, so as to avoid excessive force. 2. Medication: (1) pro-dynamic agent: such as mosapride, itopride, etc., such drugs have the effect of promoting gastrointestinal dynamics, increase intestinal peristalsis, promote defecation and improve constipation. (2) laxatives: common laxatives are keserol, lactulose, magnesium sulfate, etc., of which magnesium sulfate laxatives can cause serious adverse reactions, use with caution. All of the above drugs need to be correctly applied under the guidance of a doctor. 3. Instrumental assistance: clean enema is also commonly used in the treatment of constipation, applicable to post-surgery defecation ability is insufficient for patients. If there is no obvious effect of the above treatment measures, you should go to the hospital for systematic treatment in time.