I'm even later posting, but the above made me feel more "normal." I recently had Mod. Rad. Neck Dissection on right side and now get neck muscle spasms and right frontal headaches, so they are related to surgery (4 weeks post op) and not radiation (1-1/2 yrs, ago) or thyroid replacement (6 mos. ago). Funny thing is when I turn my head slightly to the right, it relieves the headache. Explain that one! Muscle spasms are more challenging.
Nannygranny6