A red tongue could indicate dehydration and excess heat in the body, which increases the risk of dry mouth and mouth ulcers. Vitamin B12 deficiency can also cause a red tongue.
2
White patches
Creamy white spots may indicate thrush, a fungal infection. Hard, flat, white areas that can't be scraped away may be leukoplakia.
3
Smooth tongue
A smooth tongue can indicate a lack of important nutrients like iron, folic acid, or B vitamins, or maybe a result of infections, celiac disease, or specific medications.
4
Burning sensation
Burning or stinging sensation on the tongue can be caused by toothpaste allergies or hormonal changes, as well as other health issues like dry mouth, infections, acid reflux, and diabetes.
5
Black patches
Black patches can be a sign of bacterial growth. Smoking, excessive consumption of black tea or coffee, poor oral hygiene, and prolonged antibiotic use are some common causes.