The causes of dizziness, nausea and vomiting after falling to the head are mainly seen in the following two cases: First, cerebrovascular disease: patients suddenly develop acute cerebrovascular disease, such as sudden weakness of one side of the limb, resulting in a fall, and then dizziness, nausea, vomiting, etc., to conduct a cranial magnetic resonance or CT examination to understand whether there is an acute cerebral infarction, cerebral hemorrhage, etc., resulting in nausea and vomiting after falling to the head The second is trauma. Second, trauma: Patients with a clear history of trauma from a fall or obvious fall to the head, and then dizziness, nausea, vomiting, etc., may have traumatic subdural or epidural hemorrhage, as well as traumatic subarachnoid hemorrhage, or traumatic cerebral hemorrhage, etc., and should also undergo cranial CT examination.