What Are the Causes of Oral Canker Sores?
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Acidic Foods
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Consuming acidic foods and beverages such as coffee, orange juice or tomatoes may irritate your mouth and result in oral canker sores.
Bacteria
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An infection with Helicobacter pylori in your mouth and digestive system may cause you to have canker sores in your mouth and ulcers in your stomach.
Digestive Diseases
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Diseases that cause inflammation of your digestive system, such as irritable bowel disease and Crohn's disease, may result in oral canker sores.
Injuries
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Injuries to or around your mouth, such as biting your cheek, getting hit while playing sports or having dental work, may cause oral canker sores.
Menstruation
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If your canker sores appear monthly along with your periods, they may be caused by hormone changes triggered by menstruation.
Mineral Deficiencies
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Oral canker sores may be caused by a lack of minerals including folate, iron, zinc, or vitamin B12 in your diet.
Stress
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Emotional stress from home, work or school may cause you to develop oral canker sores.
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