Panties are usually recommended to be changed once every 1-2 days or so, which is the most appropriate and healthy, and should be strictly followed especially by women to avoid causing gynecological diseases. Changing panties frequently can keep the vulva clean. Since the vulva is exposed to the outside and cannot be completely cleaned after daily urination and defecation, these bacteria will attach to the panties, and if they cannot be changed in time, it is very likely to cause vulvar infections, which may lead to a variety of gynecological disorders, so it is best to change the panties in 1-2 days. Secondly, it is recommended to replace the panties with new ones every 3 months. Even though the panties are washed and replaced in time, there will still be some bacteria left on the panties, and the number of bacteria on the panties will increase as time goes by, so replace the panties once every 3 months or so to ensure that the panties are clean. In daily life, both men and women are advised to maintain good hygiene habits, such as washing their private parts with lukewarm water every day, which can avoid many common diseases. If you have any discomfort in your private parts, please consult a doctor in time and take active treatment, so as to avoid any delay in your condition.