I have a lower back muscle spasm that has lasted six days now. I m 63 years old, obese, and have degenerative disk disease with spinal stenosis at L2-L3. The muscle pain extends all the way around to the lower right abdomen. I have noticed today several small lumps appearing just to the right of the L2-L3. They are not painful, but worrisome. I have a standing appointment with my GP in five days. I can only take Tylenol, as I m on Warfarin as well. Should I be overly concerned with the lumps? I live with pain most days, but this is excessive. I am only comfortable in a sitting position supported by my elbows.