Which statement accurately describes the onset of signs for a serious head injury?

• A. They always appear immediately
• B. They never appear
• C. They may not appear for several hours
• D. They appear only after vomiting

Answer: (C)

During a serious head injury, signs can develop or worsen over time because internal bleeding or swelling inside the skull can progress after the impact. In children, initial observations may look normal, but symptoms can emerge hours later as the brain responds to the injury. That’s why the correct understanding is that signs may not appear for several hours, not that they appear right away or never, and not that vomiting is the sole indicator.

Watch for evolving signs such as increased sleepiness or confusion, trouble waking, severe headache, vomiting that lasts or recurs, dizziness or balance problems, irritability or unusual behavior, or any new seizures. If any of these occur, or if the child loses consciousness, seek medical care promptly.