My mother-in-law is one of those and it really frosts my husband and I. No matter what is going on in our lives (or anyone elses for that matter), she has to "one-up" it. She does this with just about everything but particularly about health related issues. According to her, she's had just about everything ever possible wrong with her. In fact, after Sean was diagnosed with CF she actually went so far as to be tested herself. Of course, she was well into her 40's by then, way overweight, and she'd smoked since she was in her teens; obviously all the classic signs of someone who has CF, NOT!!! I was sooooooo embarassed when she actually told our CF Dr. about this. Our CF Dr. couldn't help but roll her eyes.
Just one more...
Recently my husband was diagnosed with a herniated disk in his back. The pain has been unbelievable and quite debilitating. Anyway, when my husband told his mother about the diagnosis, she proceeds to tell him that she knows exactly what it's like because she has a deteriorating disk. Of course, my husband, keenly aware of what kind of pain he's been in, can't believe that this woman sitting in a recliner with her legs propped up and crossed (a major No No for anyone with back problems) can actually say this with a straight face.
I've got tons of these (Fibromialgia, TMJ, asthma, RSD, sleep apnea, nerve damage, spastic bladder, etc...) but I'll spare you.
I think the saddest thing about it, really, is that she's a health care professional. Obviously some issues.