Why do ppl do cold plunges now like what are the benefits of it?? I have a Really Baddd Back 3 surgeries & 5 rods later, I suffer from the Worst Back Spasms!!! It's like since this last back surgery I've had this constant spasm usually on the left side of my spine. Actually now that I'm thinking about it it's up around where my tumor was between T11 &T12. I Love having Str8 ice on my back but it doesn't get rid of them (spasms) it jus numbs it for awhile which helps a Whole lot with my Pain!!!!