I have had lower back pain for 2 years nows. It comes in spurts and usually last for a month or so then goes away. Also in these spurts, I sometimes wake up in the middle of the night with a severe pain that makes it very hard to walk or get comfortable in any position. I have seen a chiropracter twice and he said it is just a mechanical failure, but i am unsure of that. I also saw a Neurologist and he could not find anything wrong with me. I have been through physical therarpy twice now, with little results, had 3 xrays and 1 MRI, each one was "clear" and showed no abnormalities. But, by the time i was able to get the MRI, 90% of my back pain was gone. Also, I had blood work done that was fine, but am unsure of what they tester for exactly. I am a 21 year old male, not over weight, very active and eat a very balanced diet with exercise 3 times a week. I dont know what to do about this anymore. It goes away for approx 6 months then returns lasting about a month each time. What could this be? I feel that i am doing all these test and not getting any answers. I am afraid that something is very wrong and no one is able to find it.