Dry mouth and tongue but not bitter is mainly related to oral diseases (periodontitis, etc.), gastrointestinal diseases (indigestion, etc.), mental illness (anxiety, etc.) and other factors, need to be analyzed in conjunction with the specific circumstances. 1. Oral diseases: gingivitis, periodontitis, harmful bacteria multiply, resulting in a dry mouth and tongue without bitter manifestations. 2. Gastrointestinal diseases: gastric ulcer, functional dyspepsia, enteritis, etc., so that the gastrointestinal tract dysfunction, according to individual differences, part of the population can only show astringent mouth. 3. mental system diseases: such as anxiety disorders, neurasthenia, etc., can show astringent symptoms. Simply because the excuse astringency is not bitter this phenomenon does not indicate that it must be due to what disease, may also be eating food problems or other contact with substances related to the body, if the body is not feeling well, it is recommended to consult a doctor in a timely manner to clarify the cause of the disease, so as not to delay the condition.