The severity of gastrointestinal bleeding in children is determined by the amount of bleeding. If the bleeding is very small, it is usually not serious, but you need to go to the hospital and ask the doctor to find out the cause of the bleeding and treat the cause. If the amount of bleeding is large, the condition is dangerous and the child needs to go to the hospital emergency room as soon as possible. When the amount of bleeding is large, the child may have a pale face, weakness, weakness, dizziness, cold sweat, panic, irritability and other manifestations. When the blood loss is less than 10% of the baby’s total blood volume, there can be no manifestations. When the blood loss is 10%-35% of the total blood volume, there can be a rapid pulse, cold hands and feet, low urine output, irritability, and a drop in blood pressure. When blood loss is greater than 40% of total blood volume, the child can experience shock, which is life-threatening and requires immediate emergency rescue treatment in a hospital.