you may have problem with spine before fin, but fin just catalyze destruction, it can be fixed i think,I had also pfs for many years and i have low back problems i didn't know this poison have effects on our spine.
for example i've been on itraconazole beacuse candida (it seems that i had it minimum 10yrs)-my whole body muscles started to realign (what a pain psychicaly and physically), AND IS STILL REALIGNIN. I'm hearing those pop up sound-i think decalcification pretty often during day. But I do labs before, i had cortisol progesteron acth high lvls. Also one of my nail was not looking good it was brittle. So guys first check your labs. And process of healing might be pretty ,,Jesus on desert" experience.