Why is it that motrin does not help my headache but helps my whiplash?

Anti-inflammatory: Effective with whiplash as there is a large inflammatory component, but headaches can have multiple different causative factors if headache will not resolve you need to seek care.

Differnt causes : Depending on the cause and intensity of headache, Motrin may not always help and you will need to speak with your healthcare provider. Headache is often considered a minor problem but can actually be a sign of a serious health condition.