Black gum?

Catherine • Hi! I'm Catherine, I'm 29 & mummy to 3 little boys. Mason Elliott 26/03/16 💙 Ezra George 22/05/18 💚 Archie Emerson 02/07/20 💛

My babies gum is turning darker where the tooth is coming. He does bang his mouth quite a lot does this mean his tooth will be black too? Is it worth a trip to the dentist do you think? 😫