My brother posted the results of his blood test on FB (literally a picture of the lab work paper) to let everyone know that he's healthy. He had no reason to be concerned about his health. In fact, he is very, very fit and wants everyone to know how fit he is.

He posts about going to the gym and what he eats almost daily. I also know a girl who changed her FB profile picture to one of her crying because she had just broken up with her boyfriend.