I own a lump on the top of my mouth, anyone know what it could be?

I can feel it with the top of my tongue, and when i showed it to my 12 year old brother he said, "it looks approaching a bug bite, you can see a red dot right in the middle".
Answers:
herpes? idk
Probably a cold sore or a taste bud that is swollen.
i do to but idk what it is i only get it once within a while !!

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