What is lactose intolerance?

In clinical practice, many children show diarrhea after eating milk. Treatment for this disease is mainly to eliminate digestive symptoms caused by lactose intolerance and prevent malnutrition caused by absorption problems. Patients with congenital lactase deficiency should abstain from lactose and lactase containing foods for life. Patients with primary lactase deficiency advocate controlling or reducing lactose intake. Patients with secondary lactase deficiency should first treat the primary disease.