There are many reasons for tasteless tongue, and they are commonly caused by the following: 1. Nutrient deficiency, commonly caused by the lack of trace elements and vitamins, can be checked in the hospital to clarify the cause of the deficiency. It is also recommended to take zinc supplements because zinc deficiency can lead to a lack of taste in the tongue. 2, pathological reasons, mostly seen in the atrophy of the tongue taste buds decline, with age, related diseases, such as cerebrovascular disease, kidney disease will appear the degeneration of the sense of taste, there is no taste of the tongue. 3, seen in pregnant women, especially in early pregnancy, no taste in the mouth, most of the body hormone secretion disorder and lead to. 4, no taste in the tongue. 4, the tongue has no taste is mainly due to physiological reasons, such as emotional changes, especially prolonged anxiety, depression, eating no taste, also do not like to eat, etc., in the clinical can be symptomatic treatment.