What is the one thing I should not ignore?
Hand clumsiness and unsteady walking. Dropping things, fumbling buttons or keys, handwriting getting worse, feeling unsteady on your feet, or bladder changes — with or without much neck pain — can mean pressure on the spinal cord. That needs urgent assessment, because the damage becomes permanent if it continues. It is missed precisely because people assume a neck problem must hurt.
Should I wear a collar?
No. Collars weaken the neck muscles, encourage stiffness and prolong recovery — and that includes after whiplash, where early movement produces measurably better outcomes. Keep the neck moving gently instead, even when it is sore.
Do I need a scan?
Usually not, and it can be counterproductive. Disc bulges and degenerative changes appear on the neck scans of most people over 40 with no pain at all — so finding them proves little, and being told about them increases fear and reduces movement. Imaging is genuinely important where myelopathy is suspected, or where surgery is being considered.
Is my posture to blame?
Less than you have probably been told. The evidence that posture causes neck pain is weak, and there is no single correct position. What matters is variety — change position every half hour or so. "Move more often" is better advice than "sit up straight".
Can neck problems cause headaches?
Yes — cervicogenic headache typically starts at the back of the head and spreads forwards, often one-sided, and is provoked by neck position. It responds to treating the neck rather than to more painkillers. If you are taking painkillers most days for headache, medication-overuse headache is worth considering, since that becomes self-sustaining.
Which pillow should I use?
One that keeps your head level with your spine — not a stack, and not none. Side or back sleeping is fine; sleeping on your front is the position most likely to aggravate a neck, because it holds it rotated all night. Replace a pillow once it has flattened.
How long does whiplash take?
Most people improve substantially within days to a few weeks, and the strongest predictor of a good outcome is returning to normal activity early rather than resting. No collar, keep moving, use pain relief regularly for the first few days.
My arm hurts and tingles. Is that serious?
Usually not, though it is uncomfortable and slow. Nerve root irritation causes pain down one arm with pins and needles in a particular strip, and most settles over weeks to months without surgery. What changes the picture is progressive weakness, or symptoms in both hands with clumsiness — both of which need prompt assessment.