A non-fissured tongue is relatively flat across its length. A fissured tongue is marked by a deep, prominent groove in the middle. Some people with the condition report discomfort and sensitivities.

A person’s tongue is generally flat and does not have significant grooves. Fissured tongue causes a person to develop one or more grooves on the top portion of their tongue. It does not usually ...

There are many possible causes for a cracked tongue. They include vitamin deficiencies and underlying conditions, such as psoriasis. Cracked tongue is formally known as lingua plicata. According to ...