Vomiting After Head Injury: Insights and Care Tips

09 Mar 2024, by

Dr. Lusine Badalian

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Vomiting after a head injury is a critical symptom signaling potential brain injuries or increased intracranial pressure, necessitating immediate medical attention to prevent complications such as dehydration or aspiration pneumonia. With the CDC reporting that in 2020, 6.8% of children aged 17 years and under had experienced symptoms of a concussion or brain injury, the importance of understanding and managing this symptom becomes even more evident. 

This article delves into the causes, risk factors, complications, and treatment options for vomiting following a head injury. It also outlines preventive strategies to safeguard against head injuries and the subsequent risk of vomiting, providing essential insights for the care of both adults and children.

vomiting after head injury

Is Vomiting Dangerous After Head Injury?

Yes, vomiting after a head injury is potentially dangerous and warrants attention. It signifies that the individual may be experiencing a significant reaction to the trauma, which could range from a mild concussion to more severe brain injuries

This symptom indicates that the brain might be undergoing swelling, increased pressure, or other forms of distress. When vomiting is persistent or accompanied by other worrying signs such as headaches, confusion, or loss of consciousness, it becomes critical to seek medical evaluation promptly. For both adults and children, vomiting post-head injury can be a key indicator of the injury’s severity and the need for immediate medical intervention to prevent long-term damage or life-threatening conditions.

Causes of Vomiting after Head Injury


A concussion is a type of traumatic brain injury caused by a blow to the head or body, a fall, or another injury that jars or shakes the brain inside the skull. Although it may not be immediately apparent, a concussion can affect brain function, leading to symptoms such as temporary loss of consciousness, confusion, headaches, and, frequently, nausea followed by vomiting.

Brain Contusion

A brain contusion is essentially a bruise of the brain tissue. Like bruises in other parts of the body, a contusion involves bleeding under the skin. When this occurs in the brain, it can lead to swelling and an increase in intracranial pressure. This heightened pressure is often manifested through symptoms like nausea and vomiting, which are direct responses to the brain's distress.

Skull Fracture

A skull fracture occurs when there is a break in one of the skull's bones. Such an injury can be particularly serious, not just because of the break itself, but because it can lead to brain injury and bleeding inside the head. The trauma associated with a skull fracture often triggers vomiting as a symptom, due to the severe impact and the body's reaction to the injury.

Risk Factors for Vomiting After Head Injury

Certain factors may increase the likelihood of vomiting after a head injury, making some individuals more susceptible than others. Recognizing these risk factors can help in assessing the situation more accurately:

  • Severity of the injury: The more severe the head injury, the higher the risk of vomiting. Severe impacts can cause more significant brain trauma, leading to more pronounced symptoms.
  • Age: Young children and older adults are at a higher risk. Children's developing brains are more sensitive to trauma, and older adults may have pre-existing conditions that exacerbate the injury's effects.
  • Previous medical history: Individuals with a history of migraines, motion sickness, or previous head injuries may be more prone to experiencing vomiting after a head injury.


Understanding these risk factors is essential for gauging the potential severity of a head injury and the necessity for medical attention. It's particularly vital to monitor individuals with these risk factors closely if they suffer a head injury, as they might be more likely to experience complications or require more intensive care.

Complications of Vomiting After Head Injury

Vomiting following a head injury is not merely a symptom but can be an indicator of more severe issues, leading to various complications. It's essential to be aware of these potential complications to manage them proactively:

  • Dehydration and Electrolyte Imbalance: Frequent vomiting can lead to a significant loss of fluids and electrolytes, essential for bodily functions. Dehydration can worsen the patient's condition and complicate recovery.
  • Aspiration Pneumonia: Inhaling vomit into the lungs can cause aspiration pneumonia, a severe and potentially life-threatening infection requiring immediate medical intervention.
  • Increased Intracranial Pressure: Persistent vomiting can elevate intracranial pressure, aggravating the head injury's impact and risking further brain damage.

Treatment of Vomiting After Head Injury

The treatment for vomiting after a head injury involves a comprehensive approach aimed at relieving the symptom and addressing its root cause. Along with immediate care strategies, it's crucial to consider the patient's age, overall health, and specific needs during treatment.

Immediate Care

  • Monitoring and Assessment: Continuous monitoring is essential for early detection of any worsening conditions or complications. Regular checks of vital signs and neurological status can help in timely intervention.
  • Hydration and Nutrition: To combat dehydration, it's important to maintain fluid intake. If oral hydration is not possible due to severe nausea or vomiting, intravenous fluids may be administered to ensure the patient stays hydrated.
  • Rest: Minimizing physical and cognitive activities can significantly help in reducing the brain's workload, facilitating a smoother recovery process. Adequate rest and sleep are crucial during the initial recovery phase.

Vomiting After Head Injury in Adults

In treating adults, considering the patient's medical history and any pre-existing health conditions is key. Here are additional tips and information to enhance treatment outcomes:

  • Medication Management: While specific medications can help manage nausea and vomiting, it's essential to consult a healthcare provider for recommendations suited to the individual's condition and health profile.
  • Observation and Follow-Up: Adults should be monitored for any signs of complications or worsening symptoms. Regular follow-up appointments with healthcare professionals can help in adjusting the treatment plan as necessary.
  • Practical Tips for Adults: Adults are encouraged to gradually reintroduce light meals and avoid heavy or greasy foods that might exacerbate nausea. Staying in a well-ventilated room and avoiding strong odors can also help in managing nausea.


For more insights into managing symptoms and understanding their potential implications, the Symptom Checker for Adults is a valuable online tool that can guide adults in tracking their recovery progress and deciding when to seek further medical advice.

Vomiting After Head Injury in Children

Children require a gentle and attentive approach to manage vomiting post-head injury. Here are some tips and useful information for treating children:

  • Parental Guidance: Parents should closely monitor their child for any new or worsening symptoms. Keeping a symptom diary can be helpful for medical consultations.
  • Hydration: Offering small sips of water or an electrolyte solution regularly can help prevent dehydration in children who are vomiting. Avoid giving large amounts of fluid at once to reduce the risk of further vomiting.
  • Comfort and Reassurance: Children may feel anxious or frightened after a head injury and when experiencing nausea. Providing comfort and reassurance can help alleviate their distress.


The Child Symptom Checker serves as an excellent online resource for parents to better understand their child's symptoms. It can offer guidance on when to seek professional medical advice, helping to manage the child's symptoms more effectively.

Key Takeaways

  • Immediate Action is Crucial: Prompt medical evaluation is essential if vomiting occurs after a head injury, as it may indicate serious complications.
  • Stay Hydrated: Maintaining hydration is key to managing vomiting and preventing further complications.
  • Monitor Symptoms: Continuous monitoring of symptoms and regular follow-up with healthcare providers can help in early detection and management of potential complications.
  • Safety First: Prevention of head injuries through protective gear and creating a safe environment is the best strategy to avoid vomiting and other post-injury complications.
  • Special Considerations for Children: Children require careful observation and a tailored approach to treatment due to their inability to clearly communicate their symptoms and their different physiological responses.
  • Use Reliable Resources: Utilizing online tools like the Symptom Checker can provide helpful insights, but they are not a substitute for professional medical advice.

Frequently Asked Questions

What should I do if vomiting occurs after a head injury and continues beyond 24 hours?

Vomiting that persists for more than 24 hours after a head injury can be a sign of a serious condition and requires immediate medical attention. It's crucial to monitor the person closely and consult a healthcare professional as soon as possible to determine the underlying cause and appropriate treatment.

Is vomiting dangerous after head injury?

Yes, vomiting after a head injury can be dangerous as it may indicate a significant brain injury or increased intracranial pressure. It's important to treat vomiting not just as a symptom, but as a warning sign that necessitates prompt medical evaluation to prevent further complications.

How should vomiting after a head injury be managed in children?

Vomiting after a head injury in children requires careful monitoring and a gentle approach. Ensure the child is staying hydrated with small, frequent sips of water or electrolyte solutions and consult a pediatric healthcare provider for guidance. Children's symptoms should be taken seriously, and medical advice sought to address the cause and manage the vomiting effectively.

Are there any specific considerations for managing vomiting after head injury in adults?

Adults should monitor the frequency and severity of vomiting after a head injury and seek medical advice for appropriate treatment. It's also important for adults to stay hydrated, avoid foods that may exacerbate nausea, and rest. Considering the individual's medical history and any pre-existing conditions is essential in tailoring the treatment approach.

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