A fissured tongue is exactly like the name describes a tongue with fissures on its surface. It is not a cause for concern, and it is considered a normal variation. Fissured tongue affects roughly five percent of the population. It affects men slightly more than women. This condition occurs during childhood; however, it is more prominent in adults. Fissures may become more defined with age.
While the exact cause is not known, it may be inherited. Fissured tongue may accompany these other conditions:
Geographic tongue: This is a condition that commonly shows up with fissured tongue. This condition is not a serious issue, and there are no significant side effects.
Melkersson-Rosenthal syndrome: This is a rare condition causing swelling of the lips and face. Additionally, it causes periodic facial paralysis and a fissured tongue.