A periodontal irrigator flushes out bacteria at the base of a periodontal pocket. The periodontal pocket irrigator is a handheld device that can be used by patients in their homes to irrigate periodontal pockets. The device includes a handle, a liquid container, and a plunger or other mechanism for dispensing Listerine, water, antibacterial fluid, or various prescriptions from the container, to treat periodontal disease. The container can be easily removed for cleaning. The liquid contents can be dispensed from the container through a removable tip either manually or by a solenoid or other motor. A lever can be used to move the plunger. Dispensing can be continuous, or limited to predetermined doses. The dispensing tip is angled, and can be oriented in more than one direction with respect to the handle. The device can include a light to illuminate the mouth, as periodontal disease frequently starts in the interproximal area of the molars in the darker parts of the mouth.