strange hurt

[Setzer]

everytime, after a wank, I have a terrible neckache even if I didn't assume d any strange position -.-
am I the only one?

[FalconSmash]

I get that sometimes. If you jack off hard enough, the strain can tense up some of the bones and muscles along your spinal column.

You'll be fine.

[Antares]

I think it is just the blood returning to your head after being in your penis...possibly.
Another would be your brain recouperating after the rush of hormones that are released after ejaculation.
Or some other things...I can't think of more possibilities at the moment.
However, i think you are fine. Especially if other people experience this.