Minor injuries: Accidental biting of the cheek, brushing the teeth, brushing with a toothbrush that is too hard, or poking something inside the mouth can cause mouth ulcers.
Digestive problems: Digestive problems such as stomach upset, constipation, and gas problems often manifest as mouth ulcers.
Nutrient deficiencies: Deficiencies in vitamin B12, folic acid, iron, and zinc in the body can cause frequent mouth ulcers.
Mental stress: When there is severe mental stress, the body’s immunity decreases and the risk of mouth ulcers increases.
Hormonal changes: Hormonal changes in women before menstruation can cause mouth ulcers in some people.
Food allergies: Allergies to certain foods or drinks (for example, foods that are too spicy or sour) can cause mouth ulcers.
Medication side effects: Mouth ulcers can occur as a side effect when using certain types of painkillers or other medications.
