I had the procedure performed one week ago. I have not experience any back pain just tightening of the back muscles for which I take flexiril 3 times a day. However, I have one problem that occured since then. I have very frequent urination. I wake up two and three times a night to urinate. This morning was the last straw, I slept late and when I woke up the urgency to urinate was so bad that I coughed and urine ran down my legs. Has anyone had this problem?