9 Signs And Symptoms Of A Vitamin B12 Deficiency

4. Inflamed Tongue and Sore Mouth

One of the earlier signs of vitamin B12 deficiency is glossitis or inflammation of the tongue. This may appear as a change in the shape or color of your tongue. You may find it red, swollen, and painful. Your tongue may even appear to be smooth, as the inflammation may cause it to stretch, making the tiny bumps on its surface disappear. A deficiency in vitamin B12 may also cause other oral symptoms, such as mouth ulcers, a burning or itching sensation in your mouth, or the sensation of pins and needles in your tongue.