Cracks, grooves, or clefts appear on the top and sides of the tongue. These fissures only affect your tongue. Fissures on the tongue vary in depth, but they may be as deep as 6 millimeters.

Testing showed off its near perfect accuracy. Doctors have been asking to see your tongue for thousands of years. And there's a very good reason for that. The color and condition of your tongue ...

Tongue-tie evangelists recommend lasering not ... Susan Beachy contributed research. Audio was produced by Tally Abecassis. Katie Thomas is an investigative health care reporter at The Times.

Has your doctor asked you to stick out your tongue and say “aaah”? While the GP assesses your throat, they’re also checking out your tongue, which can reveal a lot about your health.