• Genetic factors
  • Accidental bite of cheeks while eating or speaking or even while eating sharp food items
  • Viral infections
  • Low body immunity
  • Medical disorders like crohn’s disease, Celiac Diseases, Ulcerative Colitis, lichen planus, Steven Johnson syndrome, and other Blood disorders.
  • Stress
  • Vitamin deficiency especially vitamin C and B.
  • Hormonal abnormalities, especially among women
  • Cigarette smoking