Fissured tongue is a relatively common condition characterized by the presence of numerous grooves or fissures on the dorsal surface of the tongue. Heredity, aging, and/or environmental factors may play a role in its development. The condition primarily affects adults, with prevalence and severity increasing with age. The condition is mostly asymptomatic. Patients who have geographic tongue often have fissured tongue as well, which may account for a burning or irritated feeling in some patients. The condition may be present from months to years.