Does a normal CT scan mean I don’t have a brain injury?

No. A normal CT scan rules out major problems like large bleeds, skull fractures, or dangerous swelling, but it cannot detect most microscopic or diffuse axonal injuries associated with mild TBI. Research shows that many people with negative CT scans still have abnormalities on MRI or elevated blood biomarkers — and still have real symptoms. If you have ongoing problems after a head injury, follow up with a doctor even if your original CT was “normal.”