I was in the recliner watching TV one evening last week wondering what on earth I had done to make my neck (and to a lesser extent my shoulder) ache/hurt so darn much. (It couldn't have been the little bit of spring gardening earlier in the day, right?) But honestly, my head felt like it weighed a hundred pounds - - to the point where I put a cushion under my chin to try to get some relief.

With no improvement, I decided to try a booster dose of Mestinon. Voila - - about a half hour later, my neck was 100% fine. So yeah - I very much believe that weak muscles can cause soreness and pain.