with an injury like that, people see headaches with returning to activity. i think it's due to vascular spasm in reaction to the increased pressure. in theory, taking a preemptive indomethacin or ibuprofen should help, but people have a limited response to that. a blood pressure medication that works on the calcium channel--namely, amlodipine or verapamil--should be effective as they prevent vessel caliber fluctuation. talk to your doc about these options.