canker sore


: a painful shallow ulcer of the mouth that has a grayish-white base surrounded by a reddish inflamed area and is of uncertain cause but is not due to the virus causing herpes simplex compare cold sore

Examples of canker sore in a Sentence

Recent Examples on the Web Usually, though, canker sores are nothing more than super annoying yet normal nuisances many of us deal with every now and then. Jenna Ryu, SELF, 18 Mar. 2024 People sensitive to sodium lauryl sulfate (SLS), another common ingredient in toothpaste, can produce canker sores and skin peeling inside the mouth when exposed to it for a prolonged time. Popular Science, 14 Mar. 2024 According to the National Library of Medicine, berberine can also be used for burns, canker sores, liver disease, and many other conditions. Alyssa Hui, Verywell Health, 8 June 2023 Symptoms of celiac disease include cramping, amenorrhea, bloating, brain fog, canker sores, constipation, diarrhea, vomiting, fatigue, infertility, headaches and rash, among others. Morgan Hines, USA TODAY, 24 May 2023 Health officials cautioned the public that prolonged direct contact with radioactive material can cause skin rashes, hair loss, canker sores, fatigue, and vomiting. Kaweewit Kaewjinda, USA TODAY, 16 Mar. 2023 During the first three weeks with my lingual braces, my mouth felt like a giant canker sore. Jessica Wozinsky Fleming, Verywell Health, 13 Feb. 2023 Sometimes, that leads to other issues—including swollen bright red gums or salivary glands, canker sore development, bleeding gums, and gingivitis. Health Editorial Team, Health, 22 Jan. 2023 People can confuse a cold sore for a canker sore, an angry noncontagious lesion that isn’t linked with herpes, or an exceptionally painful pimple, at least in the beginning before the blister opens up. Zahra Barnes, SELF, 3 Jan. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'canker sore.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

circa 1596, in the meaning defined above

Time Traveler
The first known use of canker sore was circa 1596

Dictionary Entries Near canker sore

Cite this Entry

“Canker sore.” Dictionary, Merriam-Webster, Accessed 22 Jul. 2024.

Kids Definition

canker sore

: a small painful open sore especially of the mouth

Medical Definition

canker sore

: a small painful ulcer especially of the mouth
especially : a painful shallow ulceration of the oral mucous membranes that has a grayish-white base surrounded by a reddish inflamed area and is characteristic of aphthous stomatitis compare cold sore

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