Any sprain and/or whiplash injury can be treated effectively with this poultice made from simple natural ingredients. However, for best results and immediate relief from pain, the poultice must be applied on immediately. When applied early, you can usually make a quick recovery with no lasting negative effects.
However, for older injuries, I suspect this remedy will have little or no impact. On the other hand, it certainly doesn't hurt to try! Let me know how it works for you.