The lesion seems to be an ulcer. it occurs due to trauma or stress. It has a cycle of 2 weeks ... 1 week it will increase and other week it will reduce. Drink lots of water, have multivitamins and you can use ultigel over it.
For symptomatic relief you can apply mucopain gel.
Next Steps
get an appointment fixed with a dentist
Health Tips
Dr.Hina Mehrotra
MDS
drhinamehrotra gmail.com