Condoms put three or four years can continue to use, with the shelf life of the condom, the storage environment and condoms with or without damage and other factors, need to analyze the specific situation before deciding.1, the shelf life of the condom: condom box has a shelf life labeling code, the specific time according to the manufacturer varies. Under normal circumstances, condoms put three or four years if still within the shelf life, and well preserved can be used normally; 2, storage environment: in a normal cool, dry environment storage, and no pollution, and in the shelf life of the condom storage three or four years can be used. If the condom is placed in a moist, pollutants more, dirty environment for three or four years, the composition of the condom may be affected, the material may change, at this time it is not recommended to continue to use; 3, condoms with or without damage: it is recommended to carefully check the condom breakage and sealing, normal storage in the shelf life of the condom without damage can be used normally. If the condom is damaged or sealing is not good, there has been an opening, it is not recommended to use again. Poorly sealed condoms can harbor bacteria, which can affect your health and have an impact on the effectiveness of contraception. Condoms that have been stored for too long are susceptible to a variety of factors that can reduce the effectiveness of contraception, and contamination may lead to conditions such as inflammation of the reproductive tract. Therefore, it is recommended that you decide whether or not you can use them based on the above situation, and it is not recommended that you store condoms, which are disposable items, for too long.