Gum swelling and pain is mainly caused by periodontal abscess, periapical abscess or wisdom tooth pericoronitis, it is recommended to consult a doctor for symptomatic treatment; amoxicillin can only alleviate the symptoms. 1. Periodontal abscess: mainly developed from chronic periodontitis, which will lead to gum swelling and pain, pus overflow and other symptoms; periodontal treatment (such as ultrasonic scaling, abscess incision and drainage, etc.) must be carried out in order to cure swollen and painful gums. 2. Periapical abscess: the lack of timely treatment of pulpitis leads to the spread of inflammatory substances, which in turn causes the symptoms of swollen and painful gums in the apical part of the root; it is necessary to undergo endodontic treatment to remove necrotic nerves and inflammatory substances in order to effectively treat the above symptoms. 3. Wisdom tooth pericoronitis: Gum tissue around the crown of the wisdom tooth can also become swollen and pus-filled due to food impaction; it is necessary to carry out pericoronitis rinsing and medication in order to effectively reduce inflammation and relieve pain. Amoxicillin can be taken under doctor’s supervision to relieve the symptoms of swollen and painful gums, but it cannot cure the above symptoms, it is recommended to consult a doctor for symptomatic treatment.