Apr 3, 2018 · Canker sores occur singly or in clusters on the inside surfaces of your cheeks or lips, on or under your tongue, at the base of your gums, or on your soft palate. They usually have a white or yellow center and a red border and can be extremely painful.

May 23, 2024 · What Is a Canker Sore? A canker sore is a small, shallow, open wound or ulcer in your mouth that can make eating and talking uncomfortable. It is also known as a mouth ulcer or aphthous...

A canker sore is a painful, noncontagious sore inside of your mouth. Canker sores may be triggered by stress, acidic foods or minor trauma.

Jun 6, 2023 · Causes include minor trauma (like biting your cheek), acidic foods and even stress. Canker sores are usually white or yellow with red around the edges. Oral lichen planus. This condition can cause itchy rashes and lacelike, white sores inside your mouth.

Apr 3, 2018 · Canker sore — Learn about the causes, treatment and prevention of this painful mouth sore.

Dec 19, 2024 · Canker sores are small sores that form in the mouth. They're usually white or yellow with a red border and can appear inside the cheeks and lips or on the gums or tongue. Also known as mouth ulcers or aphthous ulcers, canker …

Apr 21, 2023 · A canker sore, or aphthous ulcer, is an open and painful mouth ulcer or sore. It’s also the most common type of mouth ulcer. Some people notice them inside their lips or cheeks.

Jan 29, 2025 · Canker sores are painful ulcers on the soft tissues of the mouth. They can develop on the tongue or gums, but are most commonly found inside the lips. They are usually red with a white or...

May 28, 2024 · Non-cancerous ulcers usually heal within a few days or weeks — if it’s sticking around, it’s time to get it checked. Most of the time, that obnoxious little sore in your mouth is a canker sore. Unlike cold sores, canker sores aren’t contagious — just uncomfortable.

Jul 11, 2024 · They can vary by size and location within the mouth, such as inside the lip, on the tongue, or the roof of the mouth. Canker sores are white or yellow and surrounded by a red area. They are painful but usually not serious, and most clear up on their own. They are not cancerous, and they are not the same as a cold sore.