Sudden onset 3 weeks ago of lower back and upper front thigh pain -- could barely stand or walk. Frozen. Now I can walk but pain appears, lessens, and reappears in various forms occasionally in lower back but also hips, upper thighs, side. Worsens when walking or standing for a few minutes, but not always. Pain is deep, dull, boring-like. It s often relieved by sitting or lying down but not always. Pain doesn t go any lower than middle of thighs, in front or on sides. Also, a couple of times a day, a sudden shock-like spasm in neck. Internist told me a few years ago that I have the bone-density better than a 25-year old even though I was 53.....now am 56.