Galactosemia is a toxic clinical metabolic syndrome due to increased galactose content in the blood. Congenital galactosemia is caused by the lack of enzymes related to galactose metabolism in the blood. The treatment principles of galactosemia are as follows: first, reduce galactose intake, such as infants and young children with galactosemia, need to choose galactose-free milk powder and no added food, can improve and treat galactosemia. If adults with galactosemia need to supplement certain enzymes, such as supplementation of galactose-related metabolizing enzymes, both can improve the treatment of galactosemia. Secondly, this symptom and this disease can be checked regularly by clinically determining the concentration of galactose, because this disease is a non-curable disease, and the concentration of galactose in the blood needs to be rechecked regularly.