What coauses canker sore?

Answer 1

The exact cause of canker sores is unknown. It is known that canker sores are not contagious like cold sores.

some of the speculated causes are:

• sugar or citrus juices
• citric acid from sources like Starburst, Skittles, juice boxes, certain sodas, and even wine coolers
• stress
• genetics
• and poor dental hygiene

Answer 2

Aphthous ulcers (canker sores) are oral sores, usually found on the tongue.

The exact cause of many aphthous ulcers is unknown but citrus fruits (e.g. Oranges and lemons), physical trauma, sudden weight loss, food Allergies,immune system reactions and deficiencies in vitamin B12, iron, and folic acid may contribute to their development. Nicorandil and certain types of chemotherapy are also linked to aphthous ulcers. One recent study showed a strong correlation with allergies to cow's milk. Aphthous ulcers are a major manifestation of Behçet disease, and are also common in people with Crohn disease.

Trauma to the mouth is the most common trigger. Physical trauma, such as that caused by toothbrush abrasions, laceration with sharp or abrasive foods (such as toast, potato chips or other objects), accidental biting (particularly common with sharp canine teeth), after losing teeth, or dental braces can cause aphthous ulcers by breaking the mucous membrane. Other factors, such as chemical irritants or thermal injury, may also lead to the development of ulcers. Using a toothpaste without sodium lauryl sulfate (SLS) may reduce the frequency of aphthous ulcers but some studies have found no connection between SLS in toothpaste and aphthous ulcers. Celiac disease has been suggested as a cause of aphthous ulcers; small studies of patients (33% or 1 out of 3) with Celiac disease did demonstrate a conclusive link between the disease and aphthous ulcers vs control group (23%) but some patients benefited from eliminating gluten from their diet.

There is no indication that aphthous ulcers are related to menstruation, pregnancy and menopause. Smokers appear to be affected less often.

Answer 3

Though the causes of canker sores are unknown, nutritional deficiencies, especially of vitamin B12, folate, or iron is suspected.

Answer 4

Canker sores occur on the inside of the mouth, usually on the inside of the lips, cheeks, and/or soft palate. They can also occur on the tongue and in the throat.