I can't really tell, I had 4 symptoms of past problems suddenly escalating on day 6 last time I took the fast, and since then I never experienced them again (so far), so there might be something interesting going on. It's possible autophagy and fat burning might remove some "memory" but I have no scientific explanation for it. My theory is that as body doesn't have to fight all kinds of pathogens coming in from food, it can start correcting internal problems/mistakes instead with the same processes it normally uses to fight external threats.

Breaking apart old injuries...? Never heard of this hypothesis, how would this work?