there are a few, personally i've had:
-myofascial release (foam rolling, massage, etc.)
-exercises aimed at fixing imbalances
-identifying what's damaged and in which position(s) it hurts, so you can figure out your optimal compensation. IE: if your back hurts when you pick up things off the floor, learn how to squat down to pick up things.
-cupping/massage/acupuncture/etc.
overall for my neck at UCSF, i had a gorgeous PT girl that i spent 4-5 hours with in total to figure out things to try to unfuck some things.
beyond that if you identify the damage, you have chemicals, hormones, surgery, stem cells, injections