What causes canker sores?!
Question: What causes canker sores!?
Answers:
The exact cause of many canker sores is unknown!. Factors that provoke them include stress, fatigue, illness, injury from accidental biting, hormonal changes, menstruation, sudden weight loss, food allergies, the foaming agent in toothpaste (SLS), and deficiencies in vitamin B12, iron, and folic acid!. Some drugs, such as nicorandil, also have been linked with mouth ulcers!. In some cases they are thought to be caused by an overreaction by the body's own immune system!.Www@Answer-Health@Com