Yes it is a sort of bubbling sensation, a bit like trapped nerve? Did it eventually just go away for you. I have M.E too btw.
The other thing it could be is that i've got a really bad cough at the moment, must be coughing 100 times a day, had it for a couple of weeks (the whole family has it) and it feels like it's a strain on my neck when i cough, especially if i'm lying down or asleep when i start coughing.
Anyway [...] it goes away soon, symptoms are piling up on me at the moment and it's annoying.
Is it a sort of bubbling sensation?
Not had that with withdrawal but has iot when first got ME - was told it's just a nerve.