Definition of canker sores
The canker sore is a small ulcer in the mouth. It is presented as an erosion of the mucosa, it is white, surrounded by an area a little red, sometimes the center is yellow. The ulcers are more or less large, more or less numerous.
They are most often located on the inside of the cheeks, tongue, under the tongue, sometimes at the gums . Depending on their location, ulcers are more or less painful. Continue reading

