Thanks for asking the query,
is usually associated with poor oral hygiene
maintainence resulting in plague and food debris accumulation, patients under certain medications like antiepileptic, antidiabetic
drugs, respiratiry disorders, GIT disorders.
I would suggest you to get a thorough clinical evaluation by a physicain.
Visit a Dentist
and get thorough clinical checkup done.
Go for complete mouth scaling and polishung every six months.
Develop a habit of brushing your teeth twice daily in back and forth up and down motion.
mouthwash gargles twice daily.
Drink plenty of water and keep yourself hydrated.
Get your blood sugar level cheked to rule out diabetes.
Clean your mouth after every meal to prevent plague accumulation.
Hope this helps out.