I understand your frustration. I also think that those who fake something, or actually believe they have something that they clearly do not, suffer another illness that I do not have the personal understanding of. I try to skim thru unbelievables, or superficials, and in person weed them out of my life. I had a woman who befriended me that lives an hour away. She has all kind of medical problems, some are real, some are not. She claims things such as this, my labs read normal ranges, but for me normal is not normal, my thyroid is off if it is in normal range. She will be too weak to walk up steps, then want to go dancing and do a 3 hr aerobic work out. I get a text that she fell down steps and knocked teeth out but when I call and ask right questions, teeth are loose and dentist put stabilizer in. Always exagerated problems.
Please do not misunderstand my kindness for stupidity. I am not going to confront on such issues, but I have to eliminate from my life. Attention seekers are very toxic, and will drain you and they contribute no real substance to any relationship. Sometimes they believe all they say, sometimes they are sociopaths, sometimes they dont fit in any place else, and sometimes they are so insecure that there is something from their past that makes them such pathological liars. Who knows what else. They are suffering something. Just always follow your gut and protect yourself first. And you have a right to feel however you feel about such behavior.
Ironically, the one thing I have the most distaste for in others are those who lie to me, for any reason, who make up stories, who are undermining. Yet since ptsd, it seems I have attracted more of these people than ever. I think it is because I lost the assertiveness to stand up, to speak up, to say, what you are telling me does not make sense and confront the issue. Maybe my own fear, but it is self destructive to allow it to take up any space in our heads. I have had to distance myself from these people.