Cracked tongue may be furrowed tongue or congenital developmental abnormality, etc. 1. Grooved tongue: the back of the tongue is characterized by grooves of different lengths and numbers. It is mainly due to the influence of age, systemic diseases and hereditary factors, and the incidence rate increases with age; some digestive system diseases and nutritional disorders such as vitamin deficiency can also lead to furrowed tongue. 2. Congenital developmental abnormality: some patients have congenital developmental abnormality, and the back of the tongue has a cleft. The above asymptomatic people usually do not need to deal with, if the fissure in the food embedded resulting in redness, swelling and inflammation, you can use chlorhexidine gargle, if necessary, cephalosporin antibiotic anti-inflammatory treatment. It is recommended to go to the regular hospital stomatology consultation, by the doctor after examination to clarify the diagnosis. Drugs should be used under the guidance of a physician.