Skin removed in injury - will it grow back?

[SilverHairedCat]

Warning: some might not like my description - may be graphic!

DH (accident prone) has taken a good slice of skin off the inside of one of his thumbs in the garage. It's about 1" x 1/2" and taken off the full depth of skin as far as I can see.

I cleaned him up and bandaged it. He removed dead skin from it 2 days later because he's a grot. It's rebandaged and cleaned a couple of times a day as he has a manual job so it needs to be tidied up from time to time. From what I know, it is better to be slightly moist, not wet, for an injury like this to heal well?

It's healing nicely - clean, not going manky or anything, but we're wondering if the skin will actually grow back? The bottom layer of the wound that's currently visible is a yellowy red colour, so I wondered if it's the fat layer I'm seeing.

Any tips? It's been 4/5 days so probably far too late to see any medical types - not that he would have gone in the first place, hence my comprehensive first aid kits.

He won't let me photograph it

Wounds heal from the bottom up. Most likely it will fill in with scar tissue rather than proper skin, but it will heal.

That's useful @Nomoreusernames1244 - I hadn't considered that

I'm guessing he'll have a few weeks of this!

It will take a while but it will grow back, yes. Think of skin grafts, the donor site grows skin back.
The yellow might be Slough, rather than fat. As long as it isn't smelly, hot or really painful he should be OK and yes slightly moist is better than dry.

I was given Flaminal to help the healing when I had a hole in my stomach after a cyst was cut out, by the district nurse who changed my dressings.