6 months baby suddenly jet spit up may be pediatric intracranial hemorrhage, congenital hypertrophic pyloric stenosis and other conditions caused by the need to comply with the doctor’s instructions for drug treatment, general measures, etc., and if necessary, also need to carry out surgical treatment. 1. Pediatric intracranial hemorrhage: pediatric intracranial hemorrhage can lead to jet spitting, if the child is conscious, the head of the bed can be raised to reduce the burden on the skull. Comatose children should be kept in lateral or prone position. And follow the doctor’s instructions to use thrombin, vitamin K1 and other antiemetic therapy, but also with the use of furosemide and other diuretics to reduce intracranial pressure. If the patient’s condition is serious, it is also necessary to choose to carry out external ventricular drainage, permanent ventricular-abdominal shunt under the guidance of the doctor. 3. Congenital hypertrophic pyloric stenosis: Congenital hypertrophic pyloric stenosis can also cause the above symptoms, need to appropriately reduce the amount of milk, the use of thicker lotion feeding, and intravenous nutritional fluids. At the same time, it is necessary to cooperate with the doctor to replenish saline, potassium, correct dehydration and electrolyte disorders, and some children can also use scopolamine to relieve pyloric spasm. If the patient has surgical indications, but also need to follow the doctor’s instructions to choose to carry out transperitoneal laparoscopic pyloric annular myotomy and so on. It is recommended that 6-month-old babies with sudden projectile spitting up seek medical attention after physiologic phenomena have been ruled out. The above medications should be used in accordance with medical advice.