A mouth ulcer can happen due to a host of reasons like stress, sharp tooth, acidity or any oral lesion. It is as such not linked with purulence of teeth.
Next Steps
A consult with a competent Maxillofacial Surgeon will help with the diagnosis
Health Tips
Ulcers which are non healing in nature in patients with habit of tobacco or Gutkha are warning signs of Oral Cancer and need immediate attention.