Weird kind of question.

[Red]

Yes there is something similar that prevents the blood coagulation so that the wound won't close at all or very slowly.
I'm not sure of the name of the disease though.

Good luck with your novel anyway!

EDIT: Found it http://en.wikipedia.org/wiki/Haemophilia

Thanks man, it's worth a rep, weird that i didn't remember this, maybe it's because it hasn't been such a big thing in anything.