That sore spot inside your mouth might look like an ordinary ulcer. Often, it is. But if mouth ulcers keep coming back, especially alongside a sore tongue or unusual tiredness, vitamin B12 deficiency deserves a closer look. B12 deficiency is known to cause mouth ulcers and a sore or red tongue, and these symptoms can happen even before anemia develops.
Why Your B12 Might Be Low
Diet is one possibility, especially if you rarely eat foods that naturally contain B12 and don’t use fortified foods or supplements. But absorption matters just as much. Some stomach and digestive conditions can make it difficult for your body to absorb enough B12, even when your diet looks perfectly reasonable. Certain medicines can also contribute to low B12 levels.
What to Do About the Ulcer
While you’re figuring out the cause, treat the ulcer gently. Keep brushing your teeth, but don’t attack the sore spot. Avoid foods that make it sting until the area settles.
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The insights shared in our articles are meant to educate and inform, not to replace a face-to-face consultation. Every smile is unique, and a proper diagnosis can only be made by a qualified clinical professional. Please book an appointment with our team or consult your local dentist for advice tailored to your specific oral health needs.
