Vitamin Deficiency
You might experience a sore tongue when your body lacks some minerals, such as folate, iron, or vitamin B12. Low levels of vitamin B12 might lead to a red, beefy tongue, while a deficiency of zinc would trigger a burning tongue. Some other common symptoms include dizziness, fatigue, muscle weakness, unexpected weight loss, tingling or numbness in limbs, and irregular heartbeats. This condition often develops over an extended period, from a few months to years. [5]
