Had a look this evening after brushing his teeth as for the last week or so he's been saying it hurts when I try to brush on that side of his mouth. Couldn't believe what I saw! That definitely wasn't there before.
The chip on his front tooth happened quite a while ago and he did bash his gum hard too, as it bled at the time.
I'll be ringing the dentist in the morning, but now I'll be worrying all night. 😢 so in the meantime, does anyone have any ideas as to what this is?