Cold neck ache.

 Pressing on the points finding clavicle along till a neck base /from a right and left/, and not depend on from A where ache localized/picture 17 a/.

With big fingers doing pressing method with a slowly rising pressure force. After not changing hands positions, with four fingers pressing on the back surface, neck/picture 17 b/.

And big fingers are tighter, squeezing and keeping muscle for the back neck side. And not forget, that tight pressing for neck using for 3 sec, and repeat method for three times.

Picture 17, as cold neck ache, points a,b.