It could be anything from tonsilitis to something much more serious. And sometimes in this life you put up with things to spare someone's feelings. I was forced by a supervisor one time to speak with one of my employees about his body odor. He started crying, and explained that no matter what he did, he couldn't get rid of the body odor.. ever since he had had chemotherapy for cancer it had changed his body chemistry to the point where antiperspirants, deodorants, etc., simply failed to work for him. I never ever again blindly followed another order in my life. Now is it really worth hurting someone's feelings, or can you put it in perspective and simply ignore it?
Yes, not flossing can make a person's breath stink. There is no perfect way to tell someone that their breath stinks. If it bothers you that much just tell them or avoid them. Just if you decide to tell them try telling them the way you would want someone to tell you. If they get offended that's on them.
just get a peace of gum out nd theyl ask 4 1 if not offer if u have no gum just tell them "will u plz back up!" nd yes it is bc they dont floss nd many other things like not brushong ther toung or havnt brushed at all