. a lump may be caused by a gum or tooth abscess or by irritation, muscle injury .
But, because any unusual growths in or around the mouth can be cancer .the growths should be checked by a doctor or dentist without delay.
For ulceration you should take Vit B capsules.
Next Steps
Visit nearest dentist
Health Tips
Eat light & healthy food ( BUTTERMILK , Curd , rice , green leafy vegetables)