Cramping around screw and rod sites

Hi everyone, I haven't been on in awhile, but I have been having some weird symptoms since having my screws and rod put in place almost two years ago. Some times when I cough a lot (being sick with a cold or bronchitis) my head, where the screws are distinctly placed to hold my head up starts to cramp. Its almost debilitating. I haven't had any success with muscle relaxers, they barely touch it. But I was wondering if anyone has any suggestions as what to do when the neck and head starts to cramp. This set of cramping has been going on since yesterday around 1pm... Thank you in advance!