Swollen gums lead to half of the face pain is best to timely medical examination, to determine the type of disease, may be the emergence of periapical periodontitis, endodontitis and other diseases, it is best to timely stomatological treatment, supplemented with medication if necessary. 1. Apical periodontitis, if it is triggered by apical periodontitis, you can choose to carry out root canal treatment, but also under the guidance of the doctor to use metronidazole, tinidazole and other drugs to avoid the spread of inflammation. 2. Pulpitis, if it is triggered by pulpitis, you can promptly consult a doctor, under the guidance of the doctor can choose to carry out root canal treatment. Usually must pay attention to personal oral hygiene, keep the mouth clean. Go to the regular hospital in time.