[RAU’s]) occur inside the mouth usually not right next to teeth, but under the tongue or between the gums and cheek. It is not known what causes these, but they are frequently painful. Canker sores are not contagious. These often occur during times of stress, and often acidic foods bring them on (oranges, lemons, grapefruit, tomatoes, etc.). Once the canker sore appears, it will take about a week to heal.
The newest and very effective treatment (not a cure) is Canker Cover, a bioadhesive patch (no prescription required). Patients who used Canker Cover had 78% of sores healed within 8 to 12 hours and average overall healing time of 1.5 days. Often used in conjunction with Canker Cover is an immediate application of Kenalog in Orabase (prescription required), and then the Canker Cover.
A 2009 study reported in a review article showed dramatic benefits for canker sore sufferers taking daily vitamin B12 supplementation. Vitamin B12 is an essential water-soluble vitamin that is commonly found in a variety of foods such as fish, shellfish, meat, and dairy products. A dose of 1000 mcg of vitamin B12 was used in patients in the intervention group for 6 months (no difference between oral or sublingual). The duration of outbreaks, the number of ulcers, and the level of pain were reduced significantly at 5 and 6 months of treatment with vitamin B12, regardless of initial vitamin B12 levels. During the last month of treatment a significant number of participants in the trial group reached “no aphthous ulcers status” versus placebo (74.1% vs 32.0%).
Lysine, an essential amino acid (of the twenty-two standard amino acids, eight are called essential amino acids because the human body cannot synthesize them), has long been reported to be a helpful nutritional adjunct in treating and preventing canker sores. A adult daily dose of 500 mg appears to provide quite a preventive benefit, while increasing that to 1000 mg twice daily during an outbreak speeds healing notably.
Some people are sensitive to a common ingredient in most toothpaste called sodium lauryl sulfate that may cause canker sores. An excellent toothpaste (without SLS) to use for people sensitive to SLS is Biotene.