Nosepiece is the supportive part of eyeglasses frame on the bridge of the nose, when need to be replaced is related to the degree of wear and tear of the nosepiece, generally the nosepiece needs to be replaced in about 3 to 4 months to achieve the effect of maintaining beauty and avoiding infection of the nasal skin. Nasal tray is an object in direct contact with the nasal skin, generally more than three to four months the nasal tray will be due to the nasal skin oil and other conditions and aging, easy to breed bacteria, a long time without replacement of the nasal tray may cause infection of the nasal skin. Nasal tray is easy to be oxidized if not replaced for a long time, and the tray will become hard and yellow, which will affect the aesthetics. Therefore, you should replace the nasal tray regularly. In general, the nasal tray should be replaced once every three to four months, and the exact replacement time is related to the degree of damage of the patient’s nasal tray. It is recommended that patients who have not replaced their nose trays for a long time should consult a hospital in time to assess their condition and receive treatment under the guidance of a professional doctor.