You felt fine at the roadside and woke the next morning barely able to turn your head. That sequence is common after a collision, and it catches people out.
This article is general information about what to do. It is not a pitch for treatment.
Get assessed medically first
After any significant collision, medical evaluation comes before anything else, particularly if there was head impact, loss of consciousness, or any neurological symptom. Emergency clinicians use validated criteria to decide whether neck imaging is needed, and that decision belongs with them.
Go to an emergency department now if you have
Any of these after a collision needs emergency assessment:
- Numbness, tingling or weakness in an arm or leg.
- Severe neck pain, particularly with midline tenderness over the spine.
- Any loss of consciousness, confusion, repeated vomiting or worsening drowsiness.
- Severe headache, slurred speech, visual changes, or unsteadiness on your feet.
- Difficulty swallowing, or a sensation that the head is unstable on the neck.
Call 911 if symptoms are severe or worsening. Do not wait to see whether it settles.
Why symptoms are delayed
Whiplash describes rapid back-and-forth movement of the neck. Symptoms commonly begin some hours afterwards — adrenaline at the time masks a great deal, and inflammatory changes develop over the following hours.
Typical symptoms include neck pain and stiffness, headache, shoulder and upper back pain, and sometimes dizziness or difficulty concentrating.
What recovery usually looks like
Once serious injury has been excluded, whiplash-associated neck pain is generally managed conservatively. Current thinking favors early return to gentle movement and normal activity rather than rest and collar use, which tend to slow recovery.
Most people improve over weeks. A minority have symptoms that persist longer and benefit from a more structured rehabilitation approach.
What helps
- Keep the neck gently moving within comfort from early on.
- Return to normal activities gradually rather than waiting to be pain-free.
- Use simple pain relief as advised so that movement is possible.
- Avoid prolonged collar use unless specifically instructed by a physician.
General information about how mechanical neck pain is assessed is on the neck pain and whiplash page.