What are the signs and symptoms of a concussion?
Guideline- Canada
- Parachute
- Concussion
- Canadian Guideline on Concussion
- All ages
- 2024 (2nd edition)
- Parents
Parachute lists these signs and symptoms:
- Physical: headache, head pressure, dizziness, nausea or vomiting, blurred vision, sensitivity to light or sound, ringing in the ears, balance problems, tiredness or low energy, drowsiness, and feeling that you "don't feel right".
- Cognitive: not thinking clearly, feeling slowed down or "in a fog", trouble concentrating, and memory problems.
- Emotional: easily upset or angered, sadness, nervousness or anxiety, and feeling more emotional.
- Sleep: sleeping more or less than usual, and difficulty falling asleep.
The guideline says a concussion should be suspected if an athlete has an impact to the head, face, neck or body and shows one or more observable signs, or reports one or more symptoms, of suspected concussion (as detailed in the Concussion Recognition Tool 6, CRT6). This includes cases where nobody saw the impact. A diagnosis is made only after a medical assessment.
Sources: https://parachute.ca/en/injury-topic/concussion/ and https://parachute.ca/wp-content/uploads/2019/06/Concussion-Guideline-2024.pdf
Added 25 Oct 2026