I could feel it start across my shoulders/ lower neck. It developed into excruciating pain wave like but not leaving for a couple of hours. I used heat and took 1 mg of Ativan and ES Tylenol.
It has not returned but I do believe it was because I lifted a too heavy load of groceries.

I have found some success with a specific strain of kratom called "Super Green Maylay" that can be obtained from Mitragaia. com.
I've also had success with a Chinese herbs tonic, that requires at least in person visit to the Practioner in Washington DC.
And my wife an Acupuncturist provides help, that only works in advance of aches or pains I anticipate coming on from physical or mental stress. ( It's marginally effective after aches begin).