Deeper explanation
Immediately after a crash, adrenaline and endogenous pain-blocking chemicals can mask injury for hours.
Soft-tissue inflammation and muscle guarding typically peak 24 to 72 hours after the event, which is why stiffness, headaches, and radiating pain often appear later.
Concussion-related symptoms — brain fog, difficulty concentrating, sleep disruption — can also emerge or worsen in the days after impact.
Urgent care
When to seek urgent medical care
- New or worsening severe headache
- Confusion, repeated vomiting, or loss of consciousness
- Progressive weakness or numbness
If you have any of the above or other emergency symptoms, call 911 or go to the nearest emergency department.
What a proper evaluation should include
- A careful symptom timeline documenting when each symptom appeared
- Neurologic and orthopedic examination
- Concussion screening when indicated
Documentation considerations
Symptom timing matters. The record should reflect what was present at the scene, in the first 24 hours, and in the days that followed.