Plastic packaging of sterile needles has a certain period of validity, generally 3~6 months. This is because the methods and materials used in the sterilization process can ensure that the needle remains sterile for a certain period of time. However, with the passage of time, the sealability of packaging will be affected, leading to the re-pollution of bacteria or other microorganisms. In order to ensure the safety and effectiveness of use, sterile needles should be stored in sterile, dry and ventilated places. This can reduce the growth of bacteria and mold. At the same time, we should pay attention to moistureproof and mildew prevention to avoid packaging being damp or contaminated by mold.