Dry mouth without taste is common for physiological reasons, such as irregular diet and insufficient water intake, and pathological reasons, such as diabetes, dry syndrome, inflammation, and so on. 1. Physiological reasons: eating spicy stimulating food, stimulate the tongue mucosa, resulting in dry mouth without flavor. Insufficient water intake, insufficient water supplementation after strenuous exercise, resulting in dry mouth; reduced salivary secretion, resulting in a weakened sense of taste, resulting in no taste in the mouth. 2. Pathological reasons: diabetes when the blood sugar control is not stable, there will be dry mouth, high blood sugar will also cause taste sensitivity is reduced, the mouth tasteless. Also seen in dry syndrome, the oral salivary glands to reduce secretion, oral mucosa dry, dry mouth without flavor. Upper respiratory tract infections and other inflammatory states, may also be due to inflammation leading to dry mouth, decreased taste, but generally accompanied by fever, cough and other inflammatory manifestations. If there is a dry mouth without taste, it is necessary to go to the hospital in time to find out the cause.