Common causes of blandness and tastelessness include weakness of the spleen and stomach, and dampness obstructing the middle jiao (dampness obstructing the functions of the spleen and stomach), which should be treated with Xiangsha Liu Jun Zi Tang Plus Subtractions and Huopu Xia Ling Tang respectively. 1. Weakness of the spleen and stomach: The symptoms of a bland and tasteless mouth are mostly caused by the exhaustion of the qi of the spleen and stomach and the dereliction of the duties of transportation and transmitting. In addition to tastelessness, there is also a lack of desire for food and fatigue (mental exhaustion and physical weakness). The treatment is to benefit qi and strengthen the spleen (regulating the qi of the spleen and stomach) and harmonize the stomach, and the formula is Xiangsha Liujunzi Tang plus subtractions. 2. Dampness obstructing the middle Jiao: The symptoms of pale, sticky and tasteless mouth are mostly caused by the lack of spleen transportation and dampness obstructing the middle Jiao. In addition to a bland, sticky and tasteless mouth, there are also symptoms such as dullness (lack of appetite and reduced food intake) and chest and epigastric constriction. The formula is Huo Park Xia Ling Tang plus subtractions. There may be other types of symptoms, so it is necessary to be guided by a Chinese medicine practitioner, and unauthorized use of medicines may have adverse effects on the body.