Severe constipation may be due to functional or organic causes. When constipation is severe, patients should go to the hospital in time, and after identifying the causes, they should choose general treatment, medication such as lactulose and polyethylene glycol, or surgical treatment. 1. General treatment: patients with severe constipation should develop good dietary habits, eat more food rich in dietary fiber such as wheat bran or brown rice, and eat more fruits rich in pectin such as banana and dragon fruit. Eat less spicy and stimulating food, drink more water and exercise moderately. 2. Medication: In case of severe constipation, lactulose oral solution and other medications can be taken under the guidance of a doctor to promote gastrointestinal peristalsis and relieve constipation. When the situation is serious, you can use laxatives such as polyethylene glycol electrolyte powder and Keselu under doctor’s guidance. 3. Surgery: When long-term severe constipation affects your life, you can choose to undergo surgery, which includes total or subtotal bowel resection, anastomotic hemorrhoidal circumcision and so on. Serious constipation, please go to the hospital in time to find out the cause, choose the right method of treatment, do not blindly use their own medicine.