If your baby has a headache and vomiting, then it may be caused by a variety of reasons. It is important to observe the possibility of central nervous system infection and whether the baby is accompanied by symptoms of upper respiratory tract infection such as fever, cough, coughing, nasal congestion, and runny nose. If accompanied by such symptoms, be highly alert to the possibility of intracranial infection. It is best to go to the hospital as soon as possible and perform chest X-ray or chest CT or even lumbar puncture or cranial CT to clarify the diagnosis. The main cause of headache and vomiting due to intracranial infection is the increase of intracranial pressure. There are also congenital causes of headache and vomiting in babies, such as square cranium, sunset eyes, congenital hydrocephalus, congenital intracranial anomalies, intracranial tumors, etc. It should also be differentiated from neurogenic headache.