Clinical headache and vomiting at the same time, mostly consider neurological diseases, acute gastroenteritis or gastrointestinal colds, as follows: 1, neurological diseases: some neurological diseases, such as cerebral hemorrhage, various causes of encephalitis, meningitis caused by cerebral edema, brain hernia, manifested as headache, nausea, vomiting, vomiting mostly jet, lumbar puncture when the intracranial pressure is very high; 2, acute gastroenteritis: the appearance of acute gastroenteritis When acute gastroenteritis occurs, it is accompanied by fever, gastrointestinal mucosa congestion, edema, and also nausea, vomiting, diarrhea, etc. When fever occurs, cerebral vasodilatation and headache symptoms will appear; 3. Gastrointestinal flu: fever caused by viruses and other infections, accompanied by gastrointestinal symptoms, headache and vomiting can also occur. When patients have headache, vomiting, stomach discomfort and other symptoms, they must seek medical attention in a timely manner, conduct systematic examination and cooperate with doctors to give comprehensive treatment to avoid delaying the disease.