Vomiting after a fall on the head mainly includes two reasons: 1, no intracranial hemorrhage occurred after the fall, if vomiting occurs, it is mostly considered to be caused by concussion, the clinical manifestations of concussion mainly have the patient may appear dizziness, headache, vomiting, insomnia, anxiety and other symptoms after the head injury, most of these patients will be relieved within two weeks. The main treatment is rest and symptomatic treatment. If you have headache, you can take oral painkillers; if you vomit, you can use antiemetics. 2. If you have intracranial hemorrhage, vomiting is mostly caused by the increase of intracranial pressure due to bleeding. Because of intracranial hemorrhage, when the intracranial pressure increases to a certain degree, it may lead to the patient’s impaired consciousness in serious cases, which can endanger the patient’s life.