I dont have any experience with these patches. According to Web MD you can bath, shower, or swim while wearing the patches. I was surprised to read that, it seems like a patch would off in water.
This is the info from the Mayo Clinic re heat sensitivity while using these patches.
"Heat can cause the buprenorphine in the patch to be absorbed into your body faster. This may increase the chance of serious side effects or an overdose. While you are using this medicine, do not use a heating pad, a sunlamp, or a heated water bed, and do not sunbathe, or take long baths or showers in hot water."
I hope some or all of that is helpful. It sounds like you really need some pain relief. I am glad that your doctors are still prescribing controlled substances, so many will not any more. I hope to hear if they bring you any relief, pray they do.
Barb