A pale mouth is usually considered to be caused by mouth ulcers, indigestion, hepatitis and other diseases. 1. Mouth ulcers: are particularly common, when the disease attack will have ulcer surface accompanied by pain, because the pain will make the oral taste sensation is relatively slow. Therefore, during the attack of mouth ulcers, there will be symptoms of bland mouth. 2. Indigestion: impaired gastric function will be accompanied by poor appetite, which will be manifested in the mouth tasteless. The symptoms include lack of taste in the mouth, and weakness in the limbs. In the case of indigestion, the food in the stomach is not digested for a long time, which will also affect the human body’s appetite. It is also accompanied by bloating. 3. Hepatitis: During the attack, the liver will affect the fat metabolism and the body’s sugar metabolism disorders, there will also be a loss of appetite, and there will be a pale and tasteless mouth in the diet. If you feel that your mouth is bland and tasteless, you can go to the doctor to find the cause and then treat the symptoms, pay attention to drink more water and keep a happy mood.