Frontal headache, nausea, vomiting, more than three factors to consider, as follows: 1, neurological diseases: such as cerebral hemorrhage, or various causes of meningitis, encephalitis caused by cerebral edema, brain hernia, can be manifested as headache, nausea, vomiting, vomiting mostly jet, lumbar puncture intracranial pressure is elevated. 2, acute gastroenteritis: if accompanied by fever, gastrointestinal mucosa congestion, edema, there will be nausea, vomiting, diarrhea and other symptoms . When fever occurs, cerebral vasodilatation will be accompanied by headache. 3. Gastrointestinal flu: Gastrointestinal flu can be caused by viruses and other infections that cause fever, accompanied by gastrointestinal symptoms, which can also occur as described above. When patients have headache, nausea, vomiting and other symptoms, they must seek medical attention and undergo systematic examination to clarify the cause and then give comprehensive treatment to avoid delaying the disease.