<s>[INST] I have had back pain for a while, upper back pain, most likely caused from my job. I tend to crack my back a lot for comfort and pain relief. I had trouble cracking it and literally tried so hard that it feels like I pulled a muscle in my chest. It is in the upper chest area, left side, closer to my collarbone. It hurts more when I lay in bed than at any other time. [/INST] For treatment of back pain you can take some painkiller like ultracet-plus or zerodol-sp only when the pain is worse enough or disturbing your daily routine along with some calcium supplements like shackled or toscal-gem once daily. Take some multivitamin like metilda-af or neurobian-plus once daily. Do some physiotherapy exercises after an expert opinion of physiotherapist. I will also advise you to sleep on a plain surface. </s>