Nasal plug

The invention discloses a nasal plug in the technical field of medical instruments, and the nasal plug comprises a nasal plug body, the nasal plug body is provided with a vent hole, a filter screen is arranged in the vent hole, the inner wall of the vent hole is further sleeved with a water absorption sponge, the periphery of the nasal plug body is further provided with an annular mounting cavity, the mounting cavity is provided with a plurality of liquid containing bags located on different circumferences, and the liquid containing bags are communicated with the vent hole. The multiple liquid containing bags are filled with liquid and located on different vertical faces, liquid leakage holes communicated with the vent holes are further formed in the positions, located on the liquid containing bags, of the mounting cavity and are opposite to the water absorption sponge, and the mounting cavity is coaxially and rotationally connected with an annular cylinder. The inner wall of the annular cylinder is provided