Mouth canker sores are the most common of all canker sores.
Mouth canker sores are usually painful and can be found in several locations in the mouth: in the back of the mouth, on the sides, on the roof, etc...
Depending where you have a canker sore in your mouth or whether you have one canker sore or several, the pain level will change. Canker sores inside the mouth that are badly located and subject to repeated trauma are usually the most painful ones.
If you often have mouth canker sores, AftaZen is a preventive treatment that can keep them away from your mouth. Learn how: