Fatigue, stress, consumption of certain hard cheeses (such as Gruyere), certain fruits such as pineapple, melon or nuts (walnuts, hazelnuts, coconuts) are all potential Formation of canker sores.
Certain drug treatments (aspirin, psychotropic drugs) or diseases of immunity (HIV,) cause the appearance of canker sores.
Canker sores usually disappear within 8 days without treatment. But when they occur on a recurring basis, it is best to consult your dentist. He will be able to prescribe a gel or an ointment directly applicable to the canker, containing in particular an anesthetic to alleviate the pain. A therapeutic mouthwash may also be effective. In n treatment and prevention also involves maintaining good oral hygiene and regular monitoring at your dentist, especially for scaling.