Abstract: An oral syringe is disclosed herein for introducing a pressurized stream of water to the user for irrigating the gums and teeth for the purpose of massage and cleansing. A manual valve mechanism is interposed in a passageway provided in the handle of the syringe for stopping the conduction of the pressurized stream therethrough and for diverting the stream into a mixing chamber for combining the stream with another substance such as mouthwash or for conducting the stream to a discharge nozzle without mixing. The valve mechanism includes a depression action as well as a rotary action to achieve the control functions.