Post-concussion syndrome
In plain English: post-concussion syndrome is when concussion symptoms, such as headaches, dizziness, poor concentration, fatigue or irritability, last much longer than the usual recovery period of a few weeks.
What it feels like
People describe it in ordinary terms: losing words mid-sentence, rereading the same email three times, feeling wiped out after a supermarket trip, snapping at the kids, struggling with bright screens or noisy rooms, sleeping badly. Many also notice anxiety or low mood. These symptoms are real, but they're invisible, which is exactly why these claims are hard.
Why the scans come back clear
Standard CT and MRI scans look for bleeding, swelling and structural damage. The injury behind concussion is usually at a microscopic level, so normal scans are expected. Insurers still point to them. Your answer is a consistent record of symptoms from the start and assessments that measure function rather than structure.
Evidence that helps
- Early records. Any note of a head strike, confusion, memory gap or vomiting at the scene or in the ER or A&E.
- Witnesses. Family, friends or colleagues who notice changes you might not see yourself.
- Neuropsychological testing. Detailed tests of memory, attention and processing speed, which also check that you're giving full effort.
- Specialist care. Notes from a neurologist, concussion clinic, vestibular physio or psychologist.
- Work records. Mistakes, reduced hours or a changed role after the accident.
A teacher is rear-ended and hits her head on the side window. Her CT is normal and she's sent home. Four months later she still can't cope with a full classroom. Her claim rests on her GP notes, a colleague's statement about her change in performance, and neuropsychological testing showing slowed processing.
What insurers argue
That symptoms are caused by stress, depression, poor sleep or an old injury, or that you're exaggerating. Consistency is your best defence: the same symptoms described the same way to every doctor, and an honest account of your history. Mood problems after a head injury are common and don't undermine your claim. They're often part of it.
Timing your claim
Many people improve over months, so settling early is risky. On the other hand, deadlines still run: generally three years in the UK, two years in Ontario, and often two or three years in US states. Speak to a lawyer well before then.
Next: concussion · traumatic brain injury · whiplash vs concussion.
Related terms
General information, not legal or medical advice. Rules differ between US states, the UK and Canadian provinces, so check the law where your accident happened. How we write and check · Legal disclaimer