10 Causes of a Sore Tongue
Cause #3: Zinc Deficiency
Zinc deficiency occurs when the serum zinc level drops below the normal range. Zinc deficiency leads to increased rates of diarrhea, acne, eczema, alopecia, angular cheilitis, oral ulceration, burning mouth syndrome, night blindness, and impaired immune function. It also causes stomatitis, which is inflammation of the lips and mouth. The combination of stomatitis and oral ulceration can contribute to pain and soreness of the tongue.
A conservative estimate has suggested that about 25 percent of the global population is at risk for zinc deficiency.
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