Canker sores are painful ulcers that occur in the mouth, including on gums. Here's a look at how to deal with them.

Medically reviewed by Brian T. Luong, DMDMedically reviewed by Brian T. Luong, DMD A mouth ulcer, also known as a canker sore, is an erosion of an area of tissue (mucous membrane) inside the mouth.

A canker sore on the tongue may cause discomfort, but it will usually heal without treatment. Possible causes include mouth injuries and certain oral products. Learn more here.

Canker sores and cold sores can be painful, but they are not the same thing. Canker sores occur inside the mouth and aren’t contagious. Cold sores typically occur outside the mouth and are very ...

Canker sores develop when your mouth has been exposed to bacteria, or if the roof of the mouth is damaged from burns. It will start off as a red bump and then fill with pus or white blood cells.

A canker sore isn’t contagious. Symptoms include a small white or yellow oval-shaped ulcer, and a painful or tingling area in the mouth. Ulcers may appear inside the lips or cheeks. You may also ...

The biopsy revealed that Henderson also had tongue cancer. “The number one thing that I want people to know is from what my dentist said — a canker sore goes away in three weeks,” she says.

Canker sores are painful sores inside the mouth. The lesions are oval shaped with a yellow-gray center that a red ring surrounds. Canker sores progress through different stages and typically last ...

Canker sores are small ulcers that develop in the soft tissues of the mouth. They can appear under the tongue, inside the cheeks or lips and at the base of the gums.

Distinguishing a cold sore from a canker sore isn’t always easy. Both types of sores affect the mouth area, and they sometimes mimic each other in appearance. But a cold sore isn’t the same as ...

Canker sores are small sores on the tongue, gums, lips, or inside of the cheeks, says Jeffy. These painful, round sores are often white or yellow with a ring of redness around them.

In the fall of 2020, Katie Drablos noticed a canker sore on the back of her tongue that wouldn’t go away. As the pain increased, she visited urgent care, wondering if it was a COVID-19 symptom.