Well this is Active Release Technique for the side of your neck:
/www.youtube.com/watch?v=wfX1FB4Pa0wIts the same thing I described for the front of your neck, but opposite. You can do that for back of neck also. But those muscles are stronger, so instead of fingers I use my Theracane to "anchor " the muscles prior to movement. I will also just "grind away" at the base of neck muscles with the small knobs on the theracane.
Treating the spine muscles between the blades (previous comment) will also help the back of your neck, since they are connected.
Base of skull: move head back, insert finger pressure in muscle at base, move head forward, hold at end a few seconds, repeat.. If this cause a back of head head ache, then find that post I made of releasing head muscles.
I used tennis ball 6 months before no more progression was made, then I stepped it up. I'm VERY aggressive now, tennis ball is to soft for aggressive work. But you have to start slow.
Quite often treating the opposite muscle of whats tight will loosen where you feel tight. Thats called refered pain. Hamstring stiff (?)back of thigh, but cant loosen it- treat the front quads, it might be those causing tension in the back.
Moving around treating/following the moving tension is an example of the "peeling onion" theory. The complete body feels better with even tension, (even if its tight). So as you loosen one area, you will be drawn to whats the next tightest on your body - as that will now bother you. This gets better in time. This is more apparent the tighter and more areas that are affected- so not as obvious with everyone.
I saved about
$1000 this year doing this on my own. Several times a day now. My left hip joint is feeling a lot better by treating the whole area around it. With even tension, the joint is not being pulled on as much, and feels better. So the issue was not from the joint, but muscles/fascia/tendons around it. Now if it will only stay that way after biking.
This is a lot of work, but does have results. I will have to read that book mentioned up there a few comments away. Very little written info on this stuff.
When the muscle is sore and beat up from this (even black/blue) that is the time for static stretching holds- so it will heal the correct length and not shortened. Youve heard of Drs re-braking a broke bone that is not healing correct, this is partially the same, but its muscles instead. There is a term for this (I forget) but pro trainers have used this "method". I do this since I had a lot of small injuries that did not heal right with lyme (I'm not normal!). They were not that serious and would have healed right in non-lymies.