People with undiagnosed symptoms should consider that they may have a vitamin B12 deficiency.
While it's unlikely that your symptoms are caused by the condition, there are still many people that have a lack of B12.
A quick blood test could reveal whether you should be adding more B12 to your diet.
You may be at risk of the condition if your tongue becomes unusually swollen.
READ MORE: Vitamin B12 deficiency - pain in these body parts could be a sign
"Some people dont consume enough vitamin B12 to meet their needs, while others cant absorb enough, no matter how much they take in," it said. "As a result, vitamin B12 deficiency is relatively common, especially among older people.
"Vitamin B12 deficiency can be slow to develop, causing symptoms to appear gradually and intensify over time.
"It can also come on relatively quickly. Given the array of symptoms a vitamin B12 deficiency can cause, the condition can be overlooked or confused with something else.
"Vitamin B12 deficiency symptoms may include strange sensations, numbness, or tingling in the hands, legs, or feet, difficulty walking [staggering, balance problems], [and] a swollen, inflamed tongue."
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Vitamin B12 deficiency - the sneaky symptom on your tongue that could be serious - Express