When you have a certain disease, your body most often sends you different kind of signals to make you see that. The body sometimes does this throughout your mouth, or more specifically said the tongue.
The tongue can point out diseases like fever, cold, hepatitis C, or bad intestine performance.
Completely healthy person should have pink tongue, that is covered with bumps which main function is recognizing the taste.
This is how the normal tongue should look like.
When your tongue is in some other color that means that something is wrong.
Your tongue can also be swollen. This usually means that you have some allergic reaction to something.
Dark tongue mean excessive use of antibiotics.
Having long ridges on your tongue is often an indication of disease that has been sexually transmitted.
If you have sleek tongue, it most probably means you have lack of vitamin B12.
One of the most serious indication is the one that points out on tongue cancer. These symptoms are usually bleeding on the tongue, sores and bumps.
It has also been found, by the scientists that long and thick tongue is a result from snoring.