There are many reasons for dry mouth. Physiological factors can be caused by dry weather, too much talking and too little drinking water, which can be relieved after replenishing water. If it continues to be unrelieved, we need to consider pathological factors triggering dry mouth and tongue symptoms, and the corresponding treatment is also different: 1. Yin deficiency and internal heat: refers to the deficiency of yin in the body, so that yin does not control yang, so that yang is relatively strong and internal heat, so the lack of yin and fluid, common dry mouth and thirst, dry throat, dry stool, urine yellow and other symptoms. In addition to dry mouth and tongue, it may also be accompanied by night sweats, hot flashes, dizziness and other symptoms. This medicine has the effect of nourishing Yin and nourishing blood, nourishing the heart and calming the mind; 2. The patient’s body is attacked by “wind-heat” and the heat burns the fluid and the lung loses its purification. The common Chinese medicines include Yin Qiao Detoxification Pills, Yin Qiao Detoxification Tablets, Antelope Cold Tablets, Cold Clear Capsules, Sang Ju Cold Tablets, etc., which are effective in nourishing Yin and moistening the lung, resolving phlegm and relieving cough; 3. Heat poisoning: Due to the deficiency of positive energy, external evil is felt, blood flow stagnates in the ligaments and blood stasis, which causes damage to the body and can manifest as dry mouth, thick tongue coating, general weakness, etc. You can take Jia Wei Yi Yao Wan, which has the effect of soothing the liver and clearing heat, strengthening the spleen and nourishing the blood; 4, Stomach fire: due to unbalanced diet, like to eat fatty sweet alcohol and spicy stimulating food, long-term can damage the stomach and intestines, resulting in stomach fire, dry mouth and tongue with irritability, dry stools, etc.. Commonly used Chinese medicines are Sanjiu Gastrodia Granules and Gastrodia Capsules, which have the effect of clearing heat and dampness, moving Qi and invigorating Blood.