So, I was diagnosed with ITP a few years ago, which means I have low platelet counts(this prevents me from playing contact sports or doing something that might hurt my head). I also have flat feet, and extremely flexible joints(I can pull my index finger well beyond 90 degrees with my palm face down). I tried looking it up, I found a connective tissue disease called Marfan's syndrome, but that doesn't explain the ITP but other connective tissue diseases do, but they do not explain the flat feet. Does anybody know of a disease that accounts for all of these symptoms?