<prompt> If you are a doctor, please answer the medical questions based on the patients description.Yes.I have a dull pain in my left lower back. I first thought I just over did it while working on my car after an afternoon motorcycle ride. I have no pain when sleeping, ie, nothing is waking me up. When I first get up, no pain, but it sets in after moving around for about a half hour. It comes and goes through the day. If I set in a comfortable chair like a lazyboy, the pain subsides, but comes back when I start to move around. Sitting in the car is a little tricky since sometimes I have the pain. If I lean a little to the right, it subsides.  <response>: Dear patient your symptoms points towards diagnosis of mechanical backache reason being muscle spasm or instability of lumbar spine. I would advise X-ray of lumbosacral spine anteroposterior and lateral views to go firm diagnosis. Start tab moral 4 mg twice a day with tab diclofenac sodium 50 mg twice a day for 5 days. Take rest on hard bed. If X-ray is abnormal you need to visit orthopedic surgeon nearby you. 