There are a few things to watch out for.
1. Excessive heat. - If you have a HOT shower, sauna, steam room you should probably avoid those because it will cause TOO much of the fentanyl to be released from the patch and you will start to become dizzy, lightheaded, nausea, and possibly throw up.
2. Tell the massage therapist to avoid putting any massage oil near or on the fentanyl patch because this will cause it to come loose and possibly fall off. The oil will get around the edge and possibly underneath and you don't want that.
Other than those 2 things, enjoy yourself and I wish that I could come along.
brian