I bought a pair of Langsha's underwear at Vipshop. I wore it for a few days and now I have a urinary tract infection. Suspect that the goods have been opened. There is also something wrong with the trademark inside. First of all, no matter where you buy underwear, you should clean it as soon as you buy it, because the products will be more or less contaminated by bacteria in the packaging process. Secondly, because the probability of urinary tract infection caused by wearing underwear is relatively low, because underwear should be cleaned every day, there are many reasons for urinary tract infection, such as poor health, vaginal flora imbalance or some psychological effects. In severe cases, you can go to the hospital for a check-up to see what bacterial infection it is aimed at. Thirdly, brand underwear is also made by the factory. As long as it is handled by people, it will not be particularly clean, so you should soak it before buying it, so you can check whether it is genuine.