Canker sores are referred to as recurrent aphthous stomatitis in medical terms.
In layman's term, they are called mouth ulcers.
Many people cannot differentiate between canker sores and cold sores and this leads them to believe that these sores are contagious.
Before we see whether canker sores are contagious or not, let us first have a look at how they are caused.
Usually these sores are seen among people aged between 10 and 20 years.
But, the can occur at any time.
Women are more prone to canker sores than men, and the sores often appear during the menstrual cycle.
Although the exact cause of disease is not known, studies have revealed that it is an autoimmune disorder.
It is believed that the cells of the body attack the lining of the mouth causing the sores.
In addition, certain other factors can result in canker sores.
These factors include allergy to ingredients in toothpastes and food items, stress, fatigue or injury to the lining of the mouth.
In addition, deficiency of Vitamin B12 or iron can also cause these ulcers.
Now coming to whether canker sores are contagious or not.
Given the fact that these ulcers are not caused by bacteria or virus clearly proves that they are not contagious.
This is in sharp contrast to cold sores, which are caused by a virus.
Doctors usually tell people with the outbreak to refrain from kissing because bacteria from the other person's mouth could aggravate the ulcers and not because they are contagious.
The ulcers usually heal on their own within a fortnight.
However, in order to relieve the pain and discomfort, you can use topical ointments or painkillers.
Taking a supplement of Vitamin B12 and iron can also hasten the healing process.
Sometimes, doctors prescribe antibiotics, but only when there is secondary infection.