Frequently swollen gums can be caused by chronic gingivitis, chronic periodontitis, wisdom teeth pericoronitis and other diseases. 1. Chronic gingivitis: chronic gingivitis is mainly due to localized plaque on the teeth, patients will have bleeding gums, gums become bright red or dark red, gum hypertrophy and other symptoms. In addition, chronic gingivitis patients will also be accompanied by local itching, swelling, pain, bad breath and other symptoms. 2. Chronic periodontitis: Chronic periodontitis is mainly caused by bacterial infection, and the main symptoms of patients are bleeding gums, loss of clinical attachment, periodontal abscess, swollen gums, etc. Root sensitivity and other symptoms will also occur. 3. Wisdom tooth pericoronitis: Wisdom tooth pericoronitis is caused by insufficient eruption of wisdom teeth or bacterial infection, and the patient will have mild toothache, swollen gums, and limited opening of the mouth, etc. In addition, wisdom tooth pericoronitis is mainly caused by bacterial infection. In addition, patients with pericoronitis of wisdom teeth may also experience pressure pain, thickening of the tongue, and loss of appetite. Patients who experience frequent swelling of the gums should seek prompt medical attention and follow the doctor’s instructions for treatment.