Dry mouth and bleeding gums may be due to periodontitis, gingivitis, leukemia, and other causes such as gingivoma. 1. Periodontitis: Periodontitis may be caused by plaque bacteria, dental calculus, heredity, smoking, mental stress and other reasons. Patients will have red and swollen gums, bleeding gums, loose teeth and other manifestations, so patients will have dry mouth and bleeding gums. 2. Gingivitis: Gingivitis is considered to be caused by misalignment of teeth, food impaction, bad restorations and other reasons. Patients will have symptoms such as bleeding gums, brittle gums, gum pain, etc., and thus patients will show dry mouth and bleeding gums. 3. Leukemia: the cause of leukemia is still unclear, considering the hematopoietic cell gene mutation, genetic changes, exposure to radiation and other reasons. Patients will have fever, bleeding, anemia, enlarged lymph nodes and other symptoms, so patients will have dry mouth and bleeding gums. 4. Other: patients with dry mouth and bleeding gums are also considered to be caused by gingival tumor, trauma to the gums, hemophilia, taking anticoagulants and other reasons. It is recommended that patients with dry mouth and bleeding gums need to consult a doctor in time, and the doctor will choose the appropriate measures according to the cause of the treatment.