Take a good look at your toes. Do you notice that your second toe is longer than your big toe? If so, you may have Morton's Toe (not to be confused with Morton's Neuroma). Some scientists and doctors believe that this condition can lead to degenerative conditions of the spine including such things as bulging discs and scoliosis as well as pain in the back, neck and shoulders.
I recently learned about this condition and I have it as does my mother. I also have DDD, sciatica, and scoliosis. Here is an interesting article from Wikipedia. Please feel free to check out the link.
http://en.wikipedia.org/wiki/Morton%27s_toe