Other characteristics of canker sores. Canker sores can be expected to heal in 4 to 14 days. Usually this healing is uneventful and with no residual scaring. Once a person has initially experienced an outbreak of canker sores the probability of their reoccurrence is high. Canker sores usually first appear between the ages of 10 and 20 years and then decrease in frequency and severity as a person matures.
Women are more likely to experience canker sores than men.
Canker sore home remedies. Canker sore variations. Usually the total number of canker sores which are present at one time will be six or fewer. If multiple canker sores are present they tend not to be clustered but instead widely distributed throughout a person's mouth. The healing of these ulcers will often be prolonged and result in scaring.