Lactulose is usually lactulose oral solution, children taking this product for three days without stool need to adjust lifestyle, adjust the dose of medication, seek medical attention to clarify the cause of the disease. 1. Lifestyle adjustments: If constipation is not relieved after 3 days of using Lactulose oral solution, it is necessary to consider that the children’s lack of exercise or water intake affects the improvement of constipation. In this case, you can increase the children’s exercise to promote intestinal motility to help defecation; increase water intake to relieve constipation caused by dry stools. 2. Adjust the dose of medication: If the dose of lactulose oral solution is not enough, constipation may not improve. Lactulose can be used for chronic or habitual constipation, etc. Adverse effects of this product can be seen in abdominal distension, long-term use may cause diarrhea and electrolyte disorders. Allergy to the product, gastrointestinal obstruction, lactase deficiency, etc. are prohibited. 3. Seek medical attention to determine the cause of the disease: If the medication does not relieve constipation, seek medical attention as soon as possible to determine the cause of the disease, such as intestinal flora disorders caused by the use of probiotics may be required to regulate intestinal flora. Children have constipation, should be under the guidance of the doctor reasonable use of drugs.