Hamster has swollen eye! Please help!

[Angel the rabbit]

I know this is a rabbit forum but I could not really get much help from the hamster forums! My hamster has a swollen eye, it just looks like a small mosquito bite but I hope that it’s nothing more serious. Should I be worried and do I need to take him to a vet?

 

[A & B]

I haven't had a hamster for years but that looks like a growth to me. I'd take him to the vet.