I used to get this a lot.
There is also fascia around the scalp and neck muscles that anchor on the back of the head can pull on the whole fascia around the head. A scalp fascia stretch and massage (slow and hold) can fix this too. Then a gell pack on the back of the head/neck will help keep it at bay.
The thing with heat or cold, your moving the fascia and muscles with a temp change, changing the tight state and they relax.
The whole body is held together with the fascia netting. Its the thin white tight stuff under chicken skin.
Post Edited (astroman) : 5/20/2017 10:02:17 AM (GMT-6)