Which statement is incorrect when comparing geographic tongue and fissured tongue?

The statement regarding the lack of association between fissured tongue and geographic tongue is indeed incorrect. Research indicates that there is a notable connection between the two conditions, with many individuals exhibiting both at the same time. This association suggests that they may share common underlying mechanisms, possibly related to genetic predisposition or inflammatory factors affecting the tongue's mucosal surfaces.

In contrast, the other statements accurately reflect the characteristics of both conditions. Asymptomatic presentations are quite common, though some individuals may experience mild discomfort. It's also true that both geographic and fissured tongues can present with significant variability in their clinical appearance, further demonstrating their complex nature. Understanding the relationships and distinguishing features of these tongue conditions is important for accurate diagnosis and patient education.