<s>[INST] I have middle back l pain only while i sleep...T 10-12....i sleep on my back for about 3-5 hours then wake up in excrutiating pain...toss and turn from side to side without relief. i have no pain during the day...run 6-10 miles a few times a week without pain. i hope you can help Toni [/INST] Hi, thank you for posting!I have gone through your query and I understand your concerns.According to your symptoms, I think that you suffer from lumbar arthritis. The diagnosis can be determined by the results of the following tests:- Lumbar CT-scanner (computed tomography)- Complete blood count- Fibrinogen test- ESR(erythrocytes sedimentation rate)- Urine testThe treatment is made with non-steroidal anti-inflammatory medications, painkillers and chiropractic procedure.You should contact your neurologist to discuss more about the diagnosis and treatment.Feel free to ask for anything unclear.All the best,Dr. Behar. </s>