DH found great relief from chiro too - went from frequent headaches that had him throwing up with the pain (dr ruled out migraines after extensive testing) at least once a week down to one a year, coincidentally two days after he missed a chiro appointment. He tried physio, numerous pain and migraine meds (prescription and OTC) with no effect.

Sitting in a hot shower with the water running over his head helped a little too (temporarily).