I have back pain in my lower back, right at the point between my butt and backright in the middle. It can either come on gradually or sudden but the pain is at its worst when I stand or walk. I am overweight but have had this for many years. It prevents physical activity, even walking. Sometimes I can walk around the block with no problem, other times I can t walk a few feet before it starts hurting. It s a burning, throbbing pain.