For neonatal serotonin, if a normal full-term baby is born, newborn screening is done within 72 hours of birth, and most of the newborn screening is done by taking blood from the heel of the foot, and then returning the results after the blood is taken and sent for testing. The newborn screening will include a condition called G6PD deficiency, now known as serosanguineous disease, in which children with G6PD deficiency have a deficiency of glucose-6-phosphate dehydrogenase. The disease can cause severe anemia, called hemolytic anemia, which can lead to sudden pallor and strong tea-like urine, often caused by eating fava beans, so it is called fava bean disease. Commonly used there are a lot of drugs also have contraindications, when he took or after the infusion, there will also be hemolysis, such as commonly used vitamin C tablets, large doses of vitamin C, as well as insecticides, antipyretics, some of the proprietary Chinese medicines, can also cause hemolysis. Therefore, if the diagnosis of serosanguineous disease is clear, it is recommended that the G6PD enzyme be rechecked after 3-6 months to clarify whether there is a G6PD enzyme deficiency. If it does, a G6PD enzyme deficiency card is usually issued, which will indicate the types of medications to avoid as much as possible.