"Joe, you have an unpleasant body odor. Now sometimes it can be a medical condition which bad medicals is why I'm talking to you about it It's not necessary to go into the discomfort it causes everyone else. It's obvious, otherwise he wouldn't be meeting with you. And to mention others at this point would make Joe more uncomfortable.
There are various chronic diseases which can also lead to bad breath as well. Various lung diseases or liver diseases, for example, can cause bad breath. And that isn't all the medical conditions that you could be suffering from that can cause halitosis some of which you may not even know medicals fake you have.
With medicals bad and fake the news out there it can't be taken back. The only thing you CAN do, though, is maintain a level of dignity for "Joe" by assuring him that the discussion is just between the two of you.
Express your commitment of support. I always make a point to say to every person to whom I deliver bad news, "I will not abandon you." I am continually amazed at the level of relief this provides. Just knowing there is someone in a position of confidence and authority who genuinely cares about what happens to them, who can explain the things that occur during the course of their illness and simply be available to them, is enormously relieving to most people. I also add, if it applies, "I will not let you suffer." Adequate training in pain relief is woefully sparse in most medical schools and residency programs, but the technology exists to mitigate, if not completely control, the pain of most (though not all) illnesses.
If you're reading this chance are you might be thinking about having unnecessary surgery because you think that you've tried everything and nothing worked. You think that surgery is your only option. Before you dive in let's take a look at an alternative that might just give you a boost. Surgery is very risky and has been described as such by the medical industry itself as well as never getting to the real issue.
It would be nice to believe that nothing will happen to you, but the reality of it is that an ounce of protection could be worth more than a pound of cure. What is Worth Protection to you? Your belongings? Your family? Your personal well-being?