Thanks for asking the query,
I would suggest you to take an x-ray of the region which will give you the clear idea,
Can be due to sinus infection
, if present refer the patient to ENT surgeon to start the treatment.
Go for the lesion biopsy
which will give the correct diagnosis and it will get confirmed by taking x-rays.
Apply pressure packs to the affected area.
Presribe the patient with metrogyl
ointment to apply topically on the area,
Ask the patient to take lukewarm saline and antiseptic mouthwash rinses.
It can also be due to hormonal
Hope this helps out.