How long after a head injury should a CT scan be performed?

There is no such thing as an "optimal time for a CT scan after a head injury." Individuals with no symptoms or only mild headaches can be observed, while those experiencing severe headache, vomiting, or other symptoms should undergo a CT scan immediately. If symptoms worsen or consciousness becomes impaired after the injury, prompt evaluation at a neurosurgery department is necessary.

If only mild headache occurs after a head injury and there are no other discomforts, it is acceptable to observe at home for 24 hours. If symptoms do not worsen during this period, urgent CT scanning is usually unnecessary. However, for children, elderly individuals, or those with underlying medical conditions, even mild symptoms warrant a CT scan within 6–12 hours post-injury to rule out potential risks.

If severe headache, repeated vomiting, blurred vision, limb weakness, or altered consciousness occur immediately after the injury, a CT scan should be performed urgently at the hospital to check for serious conditions such as intracranial hemorrhage or skull fracture, preventing treatment delays. Individuals whose symptoms worsen during the observation period should also receive a CT scan promptly.

For daily care, ensure the injured person rests quietly, avoids strenuous activity and emotional excitement, maintains a comfortable indoor environment, and follows a light, easily digestible diet. Closely monitor their level of consciousness, responsiveness, and symptom changes, and report any abnormalities to a physician immediately.