well, overall. my story is a tad different.
I went in with a pinched nerve in L4/5?. could barely walk and left actually able to move. went back 3X a week for the regular pop and crack, cut down to 2X a week, then once a week. I was at the point I could do everything I used to do but always had the pain and tenderness. on the first visit the quackpractor assured me I would be good as new, then after 5 weeks of visits, I told him I still hurt everyday, all day although I could move. he looked at me crazy and said I would never be right and would always have pain. so I paid him and never went back. during the next few weeks my pain went away and I am now whole. it is my opinion that had I kept going to the visits, I would still be in pain today, and my back weak.
imo, they help, but don't know when to quit. they need the money like everyone else. when, imo, you get to the point that the visits do no more good or harm, its time to stop going. constantly wrenching the muscles, tendons and ligaments in your spine can end up with them stretched enough that you will always have a disc trying to slide around and pinch a nerve.
and every one I know who ever went to one had a curvature of the spine. lol, my back is perfect (navy docs) and this guy, (you guessed it) said my spine is curved, showed me the x-ray from when I walked in the door. yup, curved, probably because I could barely sit or stand. they always tell you you should be in traction, but they can fix it without all that. common hook they all use, imo.
in summation: they can help, and after they stop helping, they can hurt you. don't trust their judgement, use your own head.
now for the horror story. My father in law clyde had back pain and went to them too. they cracked him, talked of traction and liked to killed him everytime they did the popping. one day he was at a real MDs house and bent over while working. the doc noticed and looked him over. the next morning at 6am the MD had Clyde in his office and cut his back open and removed a growth (cancer or no, who knows) that was pressing on his spine. this large mass showed up perfectly well on the regular x-rays, and the back-cracker totally ignored it in favor of their brand of 'medicine'.
so, check with a real MD first, then if you must see a back-cracker, use caution/be very wary. there is only 2 or 3 places in the US that teach, train, and test back-crackers, so they all have the same attitude about it. the odds of finding one that is different from the rest is slim. they're all from the sme school and mold.
-Ralph