Periodontal abscess, a purulent condition of periodontitis, typically develops as an acute process.In the initial stage, the gums suddenly swell and bulge, appearing shiny on the surface, accompanied by severe pain. At this point, pus has not yet formed. Large tartar deposits can be removed, periodontal pockets can be irrigated, and anti-inflammatory astringents or antibiotics can be injected into the pockets. Systemic antibiotics or supportive therapy may be administered if necessary.In the later stage, when pus forms and the pain slightly subsides, accompanied by a sense of fluctuation, the abscess can be incised and drained, with thorough irrigation of the pus cavity. Concurrently, mouth rinses and systemic anti-inflammatory medications should be used.Periodontal abscess is a concomitant symptom of periodontitis. After the acute phase, comprehensive periodontal basic treatment is required for the entire mouth, including necessary periodontal surgical procedures for thorough debridement. Self-oral maintenance and regular follow-ups are also essential components.