Clinical headache and vomiting at the same time, mostly considered neurological diseases, acute gastroenteritis or gastrointestinal cold, as follows: 1, neurological diseases: some neurological diseases, such as cerebral hemorrhage, encephalitis caused by various causes, meningitis due to cerebral edema, cerebral herniation, manifested as headache, nausea, vomiting, vomiting is mostly projectile, lumbar puncture intracranial pressure is very high; 2, acute gastroenteritis: acute gastroenteritis occurs Acute gastroenteritis: acute gastroenteritis is accompanied by fever, gastrointestinal mucosal congestion, edema, nausea, vomiting, diarrhea and other symptoms, cerebral vasodilatation, headache when fever; 3, gastrointestinal colds: due to viruses and other infections causing fever, accompanied by gastrointestinal symptoms, headache, vomiting can also occur. When patients have headache, vomiting, stomach upset and other symptoms, they must consult a doctor in time for a systematic examination and cooperate with the doctor to give comprehensive treatment to avoid delaying the condition.