Thanks for posting the query,
Bump formation can be because of several reasons , it can be an abscess
formation, ulceration , irritation or trauma due to the chipped tooth, plague
and calculus accumulation deep into the gum pockets.
I would advice you to visit Dentist
get a checkup done .
Take an x-ray,
Get complete mouth scaling and polishing done .
of abscess and Curretage is the treatment.
Decayed tooth is to be restored.
Maintain a good oral hygiene .
Apply dologel ointment on the affected area.
Hope this helps out.