Back pain, when gone untreated, can become a serious problem.
Your brain, being complex as it is, is always informed when there is back pain, or any body pain for that matter. This is done by your body sending messages to the brain through the spinal cord and then the brain sending messages back in return.
The reasons for back pain are not always as easy to discover as you may think. However, for the most part, the pain either has to do with muscles, bones, or disks.
The pain is usually caused if you have pulled an item far too heavy, or you have simply pulled hard on something that didn't even move. By pulling hard on an object it is very easy to pull a muscle. The muscles at play are usually the Latissimus Dorsi, Teres (major and minor) and the Trapezius.
If you feel like the pain is focused more on your upper back than anything else, then it probably in the thoracic region (upper back). Damage to that region is frequently caused by muscle strains or harm to ligaments.
Although if your back is hurting a lot and if you think that the pain is muscle related then there's not much you can do but sit back, relax, and wait it out. The pain will eventually go away all by itself.
Another cause of back pain is when it has to do with bone damage. Basically, the back is made up of the spinal cord. The spinal cord is made up of 24 vertebrates and surrounding, cushioning discs.
The three basic parts of the spinal cord include the cervical region (top of the spinal column; bottom of the skull and neck support), the thoracic region (top and middle parts of the back 12 vertebrae with ribs on both sides), and the lumbar region (5 vertebrae which supports the weight of the upper body- easily damaged).
Now that you understand the parts of the back you can understand the way it damages.
Connected to the spinal cord are cushioning disks. Mostly in older people, due to weak bones, excess pressure can be put on the disks and cause discomfort. If it gets out of hand, the disk can shift, in order to relive pressure but in return push cartilage right into a nerve root or the spinal canal, causing even more pain. This is caused a bulging disk and if these you think this could be occurring in your back then see a doctor.
Of course back pain is uncomfortable. It affects nearly everything you do, but your back pain doesn't have to last forever.