Canman23, if you sit in a hot tub, you should ice your back afterwards. The heat can make the inflamation worse so you should be careful. I have a hot tub and I would sit in it to relax and then put an ice pack on afterwards. This seemed to help.
it would for like the first half hour out of it, then it all came back. I did not know to ice my back though. I think a lot depends on why you are in-for DDD it doesn't do a thing, but for tight muscles it might. Works for some, others not, I guess.