Patients with a weak spleen and stomach may have a tasteless mouth and a thirsty mouth without the desire to drink. According to Chinese medicine, the spleen opens the mouth, and the five colors enter the taste. Patients with spleen deficiency may have a pale mouth and may suffer from loss of appetite, dullness, early satiety, distention and fullness of the abdomen and loose and frequent stools. If the patient is afraid of cold extremities and has a slightly deficient body shape, it may be a deficiency of spleen and Yang. From a western medical point of view, the early stages of infectious diseases, liver cirrhosis, malignant tumors, tuberculosis and other diseases can cause a pale and tasteless mouth. Because diseases of other systems usually affect appetite and cause decreased sensation in the stomach, for example, the earliest manifestation of new crown may be loss of taste or loss of smell.