Most often a result of small trauma such as scratch from eating chips or crusty bread or biting your cheek, these sores are hard to prevent and can cause discomfort for days. Even certain ingredients in toothpastes (typically SLS or sodium lacryl sulfate), vitamin deficiencies (B, C and D vitamines) and lowered immune systems can cause canker sores or increase their frequency.
Some are fortunate enough to be able to isolate the cause and avoid a flare-up. Others, not so lucky.
There are a number of at-home and/or over-the-counter remedies:
1) Cleanse area with equal amounts of hydrogen peroxide and water and apply to area with cotton swab (Q-tip). Follow with Milk of Magnesia dabbed on the lesions will decrease discomfort. Retreat 3-4 times daily
2) Chai tea bags cooled and placed on the area is an effective natural remedy.
3) Baking soda and water rinse neutralizes the tissues in the mouth and can aid in healing but stings when applied.
4) Rinsinol, a product by GUM, or Anbesol disinfects and numbs the area.
5) Ice chips will soothe and reduce the swelling.
1) Eat a balance diet (especially Vitamin B, folic acid and iron) and include the amino acid l-lysine in your diet.
2) Avoid acidic and salty foods that irritate the soft tissues of the mouth.
3) Manage your stress and get enough sleep to boost your immune system.
4) Avoid toothpastes that contain SLS, sodium laurel sulfates.
Any mouth sore persist longer than 2-3 weeks, requires an appointment to see your dentist or physician for a follow-up to ensure it's nothing more serious.