Thirst may be a manifestation of dry mouth syndrome or dryness syndrome. Dry mouth syndrome is simple dry mouth, commonly found in women over 50 years old, and it is recommended to go to regular hospital Chinese medicine department for regulation. The manifestations of dry mouth syndrome are dry mouth, dry eyes and knuckle pain. Some also have dry pharynx and dry nasal cavity, which are manifestations of systemic immune system diseases and need to be seen in the Department of Rheumatology and Immunology of regular hospitals for relevant examinations. According to the examination results, further treatment plan will be determined.