Can neck pain or spasm cause pain the in the jaw when you open your mouth?

Torticollis, tmj : If u get spasm in the neck mucles crossing from back to front of neck often people get some jaw joint (TMJ) pain. But often the reverse is also true, if you have popping or grinding in TMJ opening or closing mouth it may be joint causing spasm. Avoid chewing gum ; very chewy foods (taffy etc), also if u grind ur tee that night a bite guard may help "rest" the joint allowing it to calm down.