Hello
From pictures, there seems to be no issue as such, might’ve been due to trauma to the cheek due to wisdom teeth which were there.
Usually if there would’ve been any issue, they would have caused you pain or burning sensation.
But still, it’d better that you visit a dentist to ensure that it’s not due to any other issue
Next Steps
Go visit a dentist to rule out any underlying issue
Health Tips
Can do warm saline rinses