Constipation is a gastrointestinal disorder that results in irregular, difficult stools accompanied by pain and stiffness. Acute constipation can cause intestinal obstruction, which may even require surgery. Up to now, there are many different definitions of constipation, but usually in adults, it is not having a bowel movement for more than 3 days; In children, being unable to have a bowel movement 3 times a week is considered constipated. According to MSc Nguyen Duy Anh Tung - Medical Center, Tam Anh General Hospital in Ho Chi Minh City, constipation in children increases during the Tet season because the baby eats a lot of hot foods such as banh chung, banh tet, jam, sweets candy ... drink less water, sedentary.