2. Canker Sores
Canker sores are small sores or ulcers that appear inside the mouth. They are painful, self-healing, and can recur.
Healthline.com (OMS Preferred Provider)

3. Canker Sores
A canker sore is a shallow sore shaped like a crater (ulcer) on your tongue or on the inside of your lip or cheek. Canker sores have a red border and a white or yellow center. They may be painful and can make it...
Healthline.com (OMS Preferred Provider)

4. What is Canker sore?
A canker sore is a common form of mouth ulcer, which appears as a painful white or yellow ulcer surrounded by a bright red area. A canker sore sore can be triggered by emotional stress, dietary deficiencies,...
MedHelp Q&A

5. Canker sores: MedlinePlus Medical Encyclopedia
A canker sore is a painful, open sore in the mouth. Canker sores are white or yellow and surrounded by a bright red area. They are
MedlinePlus (Offsite)

6. Canker Sores
About 1 in 5 people regularly gets bothersome canker sores, which can make eating, drinking, and even brushing teeth a real pain. But just because they're relatively common doesn't mean these small open sores inside the mouth should be...
kidshealth.org

7. Canker Sores
Canker sores are a common condition that affects the lining of the soft tissue of the mouth. The medical term for canker sores is "recurrent aphthous ulcerations" or simply "aphthae." Canker ...
my.clevelandclinic.org

8. Canker sores
A canker sore is a painful, open sore in the mouth. Canker sores are white or yellow and surrounded by a bright red area. They are benign (not cancer).
www.uhseast.com

9. Canker Sore
Canker sores are shallow, painful sores in the mouth. The cause is unknown but it is felt that stress or tissue injury can trigger or aggravate a canker sore. Other triggers may include poor nutrition, acidic foods,...
healthcenter.ucdavis.edu

10. Canker Sores
Canker sores are small ulcers in the mouth caused by an assortment of viruses. A susceptibility to canker sores tends to run in families. No successful conventional treatment is available.
www.mbhs.org