Hello Hanna1,
welcome to the TOS forum.

Here is one of our useful sticky threads, full of helpful information -
http://neurotalk.psychcentral.com/thread84.html


"I feel quite fine when being on the physio's treatment couch (?) but as soon as I stand up after the treatment almost instantly the muscles in the neck and shoulder tighten up and cramp and "my" pain comes in its usual waves. The physio does not know what this is and neither do I."


It could be delayed pain or even just that gravity takes over and pulls down - starting the neck and muscles to tighten up again.