A little past 2 years post ABX, my neck muscles, are now soft and pliable (besides post workout day), it took a long time to achieve this. It used to make grinding noises that others could hear! ABX stopped the progression, but did not heal the damage on its own.
In addition to getting the critter load down, you need added circulation as stiff muscles get little circulation. Circulation brings the nutrients muscle fiber needs to remain healthy.
If your hands don't hurt , you can lightly massage your neck your self looking/feeling for tight areas. Concentrate on the tight areas. Finish with Epsom salt gel or cream (might have to order it). Do this daily. In a few months you should notice a difference, but it was very slow for me.
TMJ, also mentioned here a lot, also has to do with tight neck muscles - which reach up to your jaw/head. I seemed to have corrected that to after some lessons from a chiro.