Hi Lynjimm,

Let me add to Amy's answer. Yes, spasms which cause pain can happen anywhere. I was surprised to find spasms can even happen in the eye. Of course your husband's doctor will be the best to answer your question. In MS it can be either musculo skeletal or neuropathic pain, so it covers, everywhere muscles, bones, or nerves go, and it seems to me that's everywhere.

There are several reasons for facial pain -

One affects the triigeminal nerve, and it can seem to be concentrated in the jaw. It is excrutiating pain that can be triggered by the simplest things like brushing teeth, eating, and even breathing. Trigeminal Neuralgia (TN), also known as Tic Doloreux,  is actually a distinct condition, but 4-10% of MSers experience it.

Another distinct condition that can affect MSers is TMJ or Temporomandibular Joint Disorder can affect ligaments of the temporomandibular joint or muscles used to chew.

Do you clench your jaw?

There are probably other reasons, but these are some. Again, the best answer, and possibly even satisfatory treatment, is available from your husband's doctor.

Good luck and let us know what you learn.