Normal tongue has a dense arrangement of tongue papillae in light pink color, the surface of a thin layer of white tongue moss, the appearance of vertical bars may be map tongue or grooved tongue and other diseases. 1. Map tongue. May be related to genetic or immune factors, mental stress or lack of nutrition, may also cause map tongue, there will be the tip of the tongue in the central area of the tongue papillae atrophy become smooth, the peripheral area of the filiform papillae in the form of bands or curved distribution, lesion morphology can be in the dorsum of the tongue constantly changing. 2. Grooved tongue. The appearance of furrowed tongue is associated with mental factors, environmental factors, or other systemic diseases, such as pemphigus and syphilis, which may appear as furrowed crack-like damage on the tip of the tongue, and open furrowed cracks can be seen by arching up the tongue surface. When there is a prominent vertical bar on the tongue, you need to go to the hospital in time to check the cause of the disease and deal with it in time.