Nose washer is a tool for cleaning nasal cavity. It usually uses a certain pressure (or as the suction of a balloon nose washer, or as the gravity of a simple bottle or jar, or as an electric mechanical pressure) to send physiological saline into the nostril, flow through the nasal vestibule (the part exposed outside the head), sinus and nasal passage, bypass the nasopharynx, or be discharged from a nostril or mouth. Through the above path, diseases and filth accumulated in the nasal cavity are discharged by the sterilization of physiological saline and the impact of water flow, so as to restore the normal physiological environment of the nasal cavity, restore the self-detoxification function of the nasal cavity, and achieve the purpose of protecting the nasal cavity.