Oral Lesions

In certain circumstances, you may find yourself facing a circular wound or scar on the inside of your mouth, on some of the soft tissues inside your mouth. This wound can be the result of many different things, and a combination of many different things acting together as well. It may be a sign of something totally and completely ignorable, or it may be the first signs of a very serious infection in the soft tissues. I want to give a few options as to what an oral lesion can be a sign of. 

What Is A Lesion?

Lesions are a little bit hard to define. They are an umbrella phrase meant to act as a simple to understand term to cover several different types of injuries that have a similar morphology. In other words, little circular wounds are called lesions, regardless of what has caused them, how big they are (if they get big enough they are called an ulcer), and what sort of depth or severity they may possess. This is why a cold sore and a wound from a colony flesh eating bacteria will both be referred to as a lesion. A lesion, by definition is simply a group of damaged or otherwise irregular tissue. Yes, it’s that vague, and because of this incredibly vagueness, it is hard to tell what they are a sign of. So without further ado, let me list some of the things that having an oral lesion may be a sign of: 

Cold Sores

Cold sores are caused by the herpes virus. Herpes is an incurable virus that infects up to half of all grown up humans. If you live long enough, you will have herpes labialis, the herpes that causes cold sores. Outbreaks usually occur when your immune system is preoccupied with other things, and when it does not have the effort to restrain the virus. Usually, the virus is kept in place by your immune system, but when your immune system is down, the virus will have a little outbreak, and try to infect other people. Just use herpes medication and avoid kissing, sharing glasses and other such activities during the duration of the outbreak. 

Aphthous Ulcerations

Canker sores, RAS and aphthous ulceration are all a subset of aphthous stomatitis. This is a disease where small, circular aphthae show up in the mouth, which are basically the same as lesions. The difference is that aphthous infections are not contagious, and are a result of the body’s very own bacteria attacking the tissues of the body itself. Oral ulceration, which this is a type of, is very serious and is usually the sign of a more serious disease, and you should get yourself checked out if you have canker sores. 


Herpangina is primarily an infection of the tonsils and the roof of the mouth, and I will not write much about it here, save that it can also produce small lesions on the soft tissues. If you are experiencing an infection of the roof of your mouth along with circular sores, you probably have this condition and will have to take antibiotics. Herpangina is infectious. 

Oral Thrush

Oral thrush is a yeast infection of the mouth, caused by the same bacteria that vaginal yeast infections are caused by, the candida yeast. It first and foremost manifests itself as an infection of a thick white film on the tongue and mouth, and only later on causes smallish lesions. Nonetheless, they can be a sign of this very serious, but not life threatening infection.