Periodontitis is an inflammation of the gums and oral cavity. When a patient has periodontitis, they may experience pain and swelling. When the inflammation is severe, the patient may have a slight fever. In such cases, it is generally recommended that the patient take oral antibiotics effective against anaerobic bacteria, such as metronidazole or tinidazole, as well as anti-inflammatory antibiotics like amoxicillin, cephalosporins, levofloxacin, or erythromycin. If fever occurs, it is recommended that the patient take antipyretic analgesics, such as ibuprofen sustained-release tablets or acetaminophen tablets, which can relieve pain and reduce fever. If the periodontitis is severe, it is advised that the patient should promptly visit a hospital and follow a doctor’s guidance to develop an appropriate treatment plan. (Note: The use of medications should be under the guidance of a physician.)