Dry mouth and constipation may be caused by stomach yin deficiency and kidney yin deficiency. 1. Stomach yin deficiency: This syndrome refers to the deficiency of yin fluid, the stomach loses moistening, and descending, and the yin does not control the yang, and the deficiency fire is born within the body. Typical symptoms include dry mouth and throat, dry stools, hunger, abdominal distension, dry vomiting, etc. The symptoms of this syndrome include dry mouth and throat, dry stools, hunger, abdominal distension, and dry vomiting. 2. Kidney yin deficiency: this evidence refers to the loss of kidney yin, the loss of nourishment, yang can not be restrained, the internal disturbance of deficiency heat, common symptoms include dry mouth and tongue, constipation, short yellow urine, five heart heat (two hearts and two feet of the heart of the heart fever, and self-consciousness of the heart and chest heat), night sweating (abnormal sweating after going to sleep, waking up sweating to stop), tinnitus, and so on. It is recommended that patients with dry mouth and tongue and constipation go to the hospital for consultation and treatment by the doctor, and cooperate with the doctor for active treatment.