Also closely related to hypochondria? (Hypochondria: an irrational and incorrect belief you are constantly ill.)
I have a aunt and a sister that both have the "disease". My aunt is not allowed in any clinic in her neighbourhood anymore, because there is nothing wrong with her and still she always wants to be treated like a halfdeath person. Now she is actually sick, she has colon cancer. From all the medication she took during her life. My sister is still young, but she is heading that way too with her addiction too painkillers and all sorts of medication. I see the "disease" more like a way of getting attention. They always want to be in the middle of attention at any price. Sad, isn't?