It is not a very good sign. It's caused may be due to smoking habits. But sometimes it's caused a fungal infection. Stress also agrivate this type of lesion. Light or heavy smokers not a criteria for responsable, but immunity level of every persons are different. So please consult with maxillofacial surgeon or maxillofacial radio diagnosis expert. Who is diagnosed properly with history taking.
Next Steps
please consult with expert.
Health Tips
stop all bad habits. proper sleep. stress relief. proper nutrition in diet. fruits includes in your diet.