I woke up this morning to a spasm, but was able to rub it out and seems you already tried that. My neck and chest are tight and I'm just dealing with that. My back did flare up a couple weeks ago on one side and I couldn't walk for days. I actually used the heating pad on it all day and night and it finally let up after a few days, maybe 5 or so. I know that's not promising, but I'm with 1sweed above me saying to try the heat. It helped my back.