It can also be a symptom of scarlet fever. However, if you find your tongue is smooth and red, alongside pain in your mouth, it could be a sign of a vitamin B3 deficiency, according to a report in ...
Brushing of the dorsum of the tongue two to three times daily with 5-15 strokes using a soft-bristled toothbrush and regular dentrifice can reduce the halitosis problem. The smooth tongue has a ...