Concussion usually manifests as temporary consciousness disorder and immediate amnesia, meaning the inability to recall specific details at the time. Some patients also experience a series of clinical symptoms including headaches, dizziness, nausea, vomiting, insomnia, and memory decline. If a patient with a concussion vomits, the first step should be to conduct a head CT to rule out the possibility of intracranial hemorrhage. In addition, symptomatic treatment can be actively provided, with metoclopramide commonly used for intramuscular injection.