Canker sores; oral herpes infection,is an initial infection by the herpes simplex virus that can cause rapidly developing, painful sores on the gums and other parts of the mouth, Secondary herpes(recurrent herpes labialis) is a local reactivation of the virus that produces a cold sore.
Taking vitamin C during the prodrome may make a cold sore clear up faster,
An anesthetic such as viscous lidocaine can be swabbed on the canker sores or used as a mouth rinse
There is some suggestion that people who are low in vitamin B12, folic acid, or iron may be more susceptible to canker sores,
Home Remedies= Sauerkraut Juice swishing the mouth with an ounce of sauerkraut juice in the morning n evening swallowing about a tablespoonful. Amino acid L-lysine helps,another is Rembrandt Whitening toothpaste with fluoride, guess u would put the paste on the sores, these heplful hints were taken from "The people's pharmacy guide to home and herbal remedies"