yep I get days like this. Head seem to heavy for my neck and neck get seriously jacked off about it ( get sore as well). To the point where I feel I need to support my head by cupping my chin with my hand. Most of it is ( amplified) in the mind, although you could actually have some neck issues- which a chiro or PT might be able to help with. Certainly does for me - whether that be placebo or real I dont know, but who cares!cheers RodgerPS An OT told me looking at a computor screen for long periods, ( especially with poor posture and/or screen set up) with create real neck pain issues-which could lead to head heaviness feelings.PPS also get the jaw thing- like I have been chewing on jerky all day-BFS normal I think. Comes and goes.