Patients with periodontitis also experience symptoms of pus discharge. Periodontitis is usually caused by bacterial invasion of the periodontal tissues, leading to chronic inflammation of these tissues. Clinical symptoms mainly include swollen gums, loose teeth, and pus discharge from periodontal pockets. This disease is relatively common among adult males, especially those over the age of 35, who have a very high incidence of periodontitis. The treatment of the disease involves removing tartar and bacterial plaque, eliminating irritant factors, and then using medications. Medications such as topical metronidazole, as well as tetracycline and penicillin antibiotics, have a clear effect on the treatment of periodontitis. (Please follow medical advice when using medications.)