I have a back pain but it's not really due to injury.
There's a knot by my left shoulder blade, and it only get's tight under a few conditions.
When i'm very tired it will go crazy.
Sometimes when I rest, it kicks in and prevents me from sleeping, unless I lay on something to massage it. ( The relief is better than sex )
When active, there will be a super firm muscle by my disc as if i'm commanding it to flex, but it doesn't ever tremble or get tired.
And finally, whenever I get upset, goes crazy. Because of that, I call it my bullshit detector. Even when I'm able to cope with negativity I will be physically attacked by this pain.
Possibly there is nerve damage in the area cause when it gets bad, I get the sensation of a needle piercing through my heart.
Had this for 16 years now, it's become more rare for it to attack me, probably from the amount of times I steamrolled it will cylinder shaped objects when I perform self chiropractics.
I hate being massaged, probably because people don't know how to perform them like I can. They will beat and bruise me, except, if they follow my instruction and press all of their weight on that 1 spot, I'll feel obligated to pay them, but only if I'm being attacked by it.