Which of the following is NOT listed as a sign that a head injury requires medical evaluation?

• A. Persistent headache
• B. Dizziness
• C. Unequal pupils
• D. Nausea without vomiting

Answer: (D)

When a head injury happens, clinicians look for clear warning signs that suggest brain involvement and need for medical evaluation. Persistent headache is a common red flag, as it can indicate a concussion or ongoing intracranial issue. Dizziness is another important sign because it may reflect concussion effects or brain function disturbance. Unequal pupils are a serious alarm that can indicate shifting pressure or injury inside the skull and require urgent assessment.

Nausea without vomiting is not typically listed as a definitive standalone warning sign in basic guidance. Nausea can occur after a bump to the head for various reasons and by itself doesn’t reliably indicate a brain injury. It becomes concerning if it leads to vomiting, or if it appears alongside other red flags such as confusion, changes in consciousness, severe or worsening headache, or neurological deficits. That’s why nausea without vomiting is the best choice for NOT being listed as a sign that necessarily requires medical evaluation.