I have one attached and one unattached earlobe.
On the left side of my head, above my ear, I've developed a random bald spot slightly larger than the diameter of a quarter. Coincidentally, right below my right shoulder, I have a thick patch of back hair about the same size (my back is otherwise hairless). It's like a whole community of hair just said "fuck it" and moved to my body's equivalent of Florida.
My immune system thinks I'm allergic to the progesterone I naturally release.
I have a perfectly smooth mushroom shaped, skin colored mole on the side of my head and I've had it since birth. My mom says it looks like a penis, you know, nice stuff that moms say.
Brains are part of the body, right? I have Prosopagnosia (face blindness), which means that I do not recognise or remember faces. I can look at someone, turn around, turn back, and I won't recognise their face. I don't recognise my coworkers, friends, or family by face. I have a lot of funny stories related to this...
I have a congenital blood disorder called Haemochromatosis. This means that my body absorbs far too much Iron from my diet and since it can't be expelled easily, my body stores the excess Iron wherever it can and the build up of it can cause nasty complications if not treated.
I also have Anaemia. Which is very strange as I have all this Iron in my body but yet it isn't being absorbed into my blood stream. Even Specialists at the BMA (British Medical Association) are scratching their heads about this and frequently ask for samples to research.