I had a small burn on my hand recently that developed a scab that I couldn't resist picking and eating. There was a little blood that I sucked out.
I was wondering if sucking your own blood or biting at your own scab or otherwise consuming yourself was halachically permissible, since, as far as I can tell, humans are not kosher. Even so, it would seem that autocannibalism in some form or another is basically unavoidable and I have never heard of it being prohibited.