Patients with pain at the junction of the ear and face after opening the mouth are advised to actively apply antibiotics to reduce inflammation, commonly used cefprozil tablets or clindamycin capsules, or try cefdinir dispersible tablets or cefixime tablets, and need to clarify allergy history before using the drugs to avoid allergic reactions. Patients should drink more water after applying antibiotics to promote drug absorption, and observe changes in the condition for three days. If the pain is still not reduced, patients need to go to the hospital to further improve the CT examination to clarify the condition. Patients should not eat hard things during the illness, which can easily lead to increased pain. If necessary, consider using cold towels on the junction of the ear and mouth to reduce the pain.