I recently had Botox trigger point injections in my back for chronic pain. Two days later I started having a burning, stinging, cramping pain at the base of my neck and upper back on the right side which is not where the targeted pain is (my back pain is along the shoulder blades). I believe this new pain is being caused by the Botox migrating outside of the area where the injections took place. My doctor has instructed me to apply ice & heat and to do neck stretches. I'm also told to just wait for it to get better. I'm dreading the fact that Botox can last 4-6 months in your system. It's been 3 weeks now and the pain seems to be getting worse (more frequent).