I have this sharp pain right next to me spine, when doing certain back stretches. I went to the doctor yesterday but he couldn't find anything special and just said that I should do some physiotherapy. The pain seems to subside, but when I do Uddiyana Bandhas it comes back in full effect. At first I thought it has something to do with arching my back while doing the exercise, but actually it doesn't matter how I bend my spine. Any ideas how that exercise could effect my back? 