Is Vomiting Dangerous After Head Injury? Among the most frequent medical emergencies, there are head injuries, both minor bumps and severe traumatic brain injuries. Some symptoms can be mild in the beginning, but there are those that may indicate severe complications. Vomiting after a head injury is one such symptom that can be a cause of concern to patients and caregivers. The question that most people are likely to ask is, " Is vomiting dangerous after head injury? Login Login 0 repins 0 comments 0 likes