Apical periodontitis can choose medication and root canal treatment. 1. Medication: you can choose oral amoxicillin capsules or cefixime capsules, with metronidazole tablets or tinidazole tablets, which can promote the recovery of apical inflammation. 2. Root canal treatment: the most effective way to treat apical periodontitis, mainly divided into three steps, the first step is under local anesthesia to open the pulp drainage, sealing the inactivator in the root canal, so that the nerve is inactivated. The second step removes the inactivated nerve completely, disinfects the root canal and changes the medication. In the third step, the root canal is filled when there is no obvious percussion pain and no obvious inflammatory oozing from the root tip. Tooth apical periodontitis timely to the hospital, in the doctor’s advice to choose the most reasonable treatment, in order to promote the recovery of inflammation, the use of drugs need to follow the doctor’s advice.