What is this on my child’s gum?

[Cxxx2]

Hi all,
I’m just wondering if anyone knows what this is on my childs gum/cheek. It’s not sore, her face doesn’t seem swollen. It’s situated on the inside of her cheek.I did at first think abscess but it’s on the cheek rather than the actual gum beside teeth.
picture attached

Has she not just given it a nasty bit at some point?

Looks like a bite... could be an ulcer but id definitely swing to her having bit it first

Thank you for your replies. She can’t recall biting it but she possibly has and not gave it much thought. Thanks again☺️