How does a 'hole' heal up?

[OrmIrian]

DS#2 has a big chunk out of his lower back after this accident last night. OK, I exagerate a little but it's the size of a 2p piece and about 1 cm deep. It can't be stitched because of the missing tissue, so how does it heal up. Will he always have a dip there?

Probably sounds a stupid question but I genuinely don't see how the hole will fill up again as there is some tissue missing.

My brother had to have a mole removed from his back, then after that a big cyst thing developed that also had to be removed, so he was left with a 2 inch wide hole.

It had to be packed every day with special material. He took off his shirt to show me without warning me how bad it was, and I actually screeched. I had to pack it for him for a few days while our mom (the nurse) was gone.

It did heal up fine, he did have a scar. Apparently it looks to some people like a bullet wound. When people ask him what happened, he likes to say 'Vietnam'. Mind you he is only 26, but it is surprising how many people don't question this!