Gingival abscess after root canal treatment did not subside can be treated by general treatment, drugs (metronidazole, amoxicillin, etc.), surgery and other methods. 1. General treatment: patients need to pay attention to oral hygiene, timely removal of food debris, provide nutritional support for patients to ensure that the patient’s water, electrolytes and acid-base balance. 2. Medication: After root canal treatment, if the gum abscess does not subside, it can be treated with metronidazole, tinidazole, ceftazidime, ceftriaxone, procaine, ornidazole, amoxicillin and other medications under the guidance of the doctor. 3. Surgical treatment: you can incise the local abscess, drain the pus, and at the same time flush the abscess cavity, remove all the necrotic tissues to ensure that the pus is adequately drained, and if there is a periodontal pocket formation, the periodontal pockets should be adequately removed, and at the same time injected with antimicrobial drugs, remove tartar, tartar and other irritants in a timely manner, to maintain local cleanliness. It is recommended that patients go to the hospital in a timely manner, under the diagnosis of the doctor, take targeted treatment, pay attention to oral hygiene in life, brush teeth on time, is conducive to promoting the recovery of the disease.