Thanks for your response, Connie. The pain had subsided a month or two after treatment, but now has ramped up in intensity to a level of 7 out of 10. It isn't all the time, just when he gets up after a nap. He paces and does neck stretches for about 10 minutes to work through it. The docs don't seem to have an idea about the root cause, which in addition to pain that isn't under control, is an additional source of frustration.