Why do some cuts/scratches/wounds heal relatively fast, and some take a whole lot longer?

Question

I have a tiny scab on my arm that has scarred and reopened multiple times, but large surgery wounds I’ve had have healed completely in less time than I’ve had this one. Am I just stupid and missing something obvious?

EDIT: I don’t pick at scabs. I can recognise basic cause and effect.

In: 29

Answer 1

It mainly depends on how much circulation an area gets and how close it is to the heart. Toes heal the slowest, mouth heals the fastest. Plus surgery wounds are stitched and glued together.