Bright Red Surface
If you notice some red patches or blemishes that turn your tongue into bright red, it can be a sign of anemia or iron deficiency. Also, a rare disease called Kawasaki disease can also be the cause of this problem. This condition inflames the body’s blood vessels, especially in children. Another condition that is associated with bright red tongues is scarlet fever. In some cases, a deficiency of vitamin B3 or vitamin B12 can lead to a change in the tongue color as well. Since this sign is linked to many conditions, make sure to consult your doctor to get a more precise diagnosis. [3]
