How much vomiting should prompt a visit to the hospital?

Reviewed by Yoshinori Abe, MD

Internal Medicine

Vomiting after a head injury—especially repeated vomiting—is a warning sign of a potentially serious brain injury, such as a concussion, skull fracture, or internal bleeding. Anyone who vomits after hitting their head should seek emergency medical care right away to rule out life-threatening complications.

Because head injuries can worsen quickly and symptoms aren't always obvious, it's critical to act fast. If you're unsure how serious your symptoms are, take a free, instant, online symptom check to better understand what may be happening and get clear guidance on your next steps.

Reviewed for medical accuracy: 07/15/2026

Important Next Steps

Learn when vomiting needs urgent care Discover likely causes of vomiting See if vomiting needs a doctor Find OTC relief for vomiting Find a doctor for vomiting Learn home remedies for vomiting Understand if vomiting could be serious

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Explanation

Vomiting can be a sign of a serious problem after a head injury. Research shows that vomiting, especially repeated vomiting, can sometimes mean there is a risk of a brain injury.

When to Go to the Hospital:

After a Head Injury: If someone hits their head and vomits, it is important to see a doctor.
Repeated Vomiting: If vomiting happens more than once, it is more concerning.

Why It Matters:

Brain Safety: After hitting the head, the brain might be hurt. Vomiting can be a sign that something is wrong inside the head.
Checking Inside the Head: Doctors can do special tests to make sure the brain is okay.

It is always better to be safe and have a doctor check if there is any concern after a head injury. If you're unsure whether your symptoms require immediate medical attention, you can use this free symptom checker to help evaluate your condition and determine the best next steps.

(References)

Hugenholtz H, Izukawa D, Shear P, Li M, & Ventureyra EC. (1987). Vomiting in children following head injury. Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery, 3427567.
Harper JA, Klassen TP, Balshaw R, Dyck J, Osmond MH, & Pediatric Emergency Research Canada Head Injury Study Group. (2020). Characteristics of vomiting as a predictor of intracranial .... CJEM, 32513343.
Nee PA, Hadfield JM, Yates DW, & Faragher EB. (1999). Significance of vomiting after head injury. Journal of neurology, neurosurgery, and psychiatry, 10201418.

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