Back pain please read

Patient: I’m 22 years old and I’ve been getting really bad pains in my middle part of my back for as long as I can remember, if I stand for 2 hours sometimes less, I get these bad stabbing pains and the only way to ease it is by sitting with my back to a wall or laying down. I’ve went to my doctor and he tells me it’s because I’m a smoker…. I can’t work because of this ­čÖü please help

Symptoms: Back pain

Doctor: