question: I am 33 and have been having lower back spasms for about 10 years where I get a shooting pain and my back seems to lock up. About a month ago I began experiencing ongoing pain in my back. I stopped doing yoga and heavy aerobic classes and have begun walking instead. I feel no pain during this. Recently I began experiencing pressure on my tail bone when I need to defecate. I'm sick of the constant pain...any ideas?