11 days ago now my ds, 7, fell down the stairs and hit his head on a chair at the bottom.
He split his head open in his hairline on his forehead.
I took him to A&E and they glued it closed.
It was glued by an F2 who seemed to need the support of the nurse. I don't believe she had done it before. Anyway she kept topping up the glue on his head until the tube was finished.
Initially I was supprised by the amount of glue running down his forehead, but assumed this was normal.
Anyway we kept it dry as instructed and left it be.
He ended up with a big gluy mass off hair and glue over the cut.
After 10 days I cut the hair and glue off. He now has a sore over the cut from where the glue has irritated his skin.
He then had a big spikey chunk of glue sticking to the cut.
So on day 11 I gently saw if it came off with tweezers. It did and he didn't even flinch.
So anyway he now has an open hole as the glue seems to have been smeared around the wound and filled up 'plugged' the actual wound rather than sticking the edges back together. 
My question is.... Is it too late to do anything about it now, 11 days after the accident?
Shall I just let it heal as is and face the fact he will have a huge scar?
TIA