Update! Help! Doggie licked himself raw!

me-me

So my dog licked by his bum raw well I was sleeping. I thought it was cuz his tummy was upset. (He ate human food so I thought that’s what it was originally or a hot spot) but now that spot he licked has a bump on it looks like a big bite (we going to the vet 1st thing in the morning) but in the meanwhile any ideas fur mammas?

My poor fur baby 🐶

Update: my puppy has an open anal gland

They have to do a minor surgery....😢