That’s what you get for not chewing.
I have a tendency to eat like a goat when I’m really hungry; just sorta shoving food into my mouth with little-to-no regard for how my mouth is supposed to process all of it. Because of this, I have a bit of a bad habit of hurting the inside of my mouth, whether it be from pointy food pokes or hot food burns. Luckily, the human mouth is actually surprisingly resilient as far as body parts go.
Because the mouth is a bit of a… squishy body part, for lack of a better word, it tends to naturally heal from trauma very quickly. Minor injuries like small cuts, tiny pokes, or slight burns will usually heal on their own in a few days time. As long as you don’t do anything stupid to deliberately aggravate the injured spot, you’ll be just fine.
In the event of a slightly more severe injury, such as a deep enough cut to bleed, there still isn’t much cause for alarm. You should go see a doctor, but they’ll probably tell you something similar: leave it alone and it’ll heal. Worse injuries may necessitate stitches, though doctors use special stitches for mouth injuries that dissolve when healed, so again, just leave it be.
The only real cause for alarm is if the injury becomes infected, in which case, you’ll probably need to take some prescribed antibiotics. You should also be careful about what you eat, as certain salty, spicy, or citrus-y foods can cause pain and inflammation. Eat soft foods, as well as the occasional ice pop to cool things down in there.
Of course, just because mouth injuries heal quickly doesn’t mean you shouldn’t care. Don’t be a dummy goat like me; chew your food properly, and don’t put anything weird in your mouth.