It maybe a cyst. These swellings are usually painless.
You will not have pain but this is a disease too. It can spread rapidly to other regions of jaws as well as sinuses, nose, throat etc.
This is just a guess. Nothing can be said without clinical examination or 3D scans.
Next Steps
Visit dentist for clinical examination.
Health Tips
Kindly do not ignore. Do not try any home remedies.