An apical abscess is usually a purulent inflammation of the apical region of a tooth, usually due to the formation of periapical granulomas and periapical cysts. In the current clinical practice, the treatment of apical abscesses is decided according to the acute and chronic nature of apical abscesses. 1. Acute abscess: first of all, pain relief should be taken, followed by anti-infection spreading disposition, and finally, thick fluid drainage. If there is no pus formation in the early stage of acute abscess, remove large pieces of tartar first and give systemic antibiotic therapy if necessary. If there is already pus formation, the area is cut open with a sharp knife blade, the abscess cavity is flushed with saline, and then some antibacterial and antiseptic medication is placed. Be careful not to flush the pus cavity with hydrogen peroxide when flushing. After the incision and drainage, the doctor usually instructs the patient to gargle daily with saline or chlorhexidine solution. 2. Chronic abscess: The patient’s teeth should first be cleaned before periodontal surgery is performed. Depending on the patient’s condition, there are usually abscess removal and flap surgery. The main role of flap surgery is to facilitate the repair and healing of the tissue after surgery. Patients who usually suffer from apical abscesses are recommended to take the appropriate treatment plan according to their acute and chronic nature. Patients with acute abscesses need to keep the infection under control in time to prevent the formation of chronic abscesses.