Women's underwear should be cleaned after being worn for at most three times. If you sweat a lot, you must clean it every day.

The reasons are as follows:

1. The body often perspires, and may be infected with some bacteria and viruses. Therefore, in order to avoid a series of diseases of reproductive organs, it is necessary to wash underwear as often as possible, which will greatly reduce the chances of women suffering from vaginitis or other gynecological diseases.

2. The grease and dirt secreted by our bodies will affect the elasticity of underwear in the long run, so wash your underwear as often as possible and of course buy more underwear to wear instead.

Extended information:

Underwear can be directly thrown into the washing machine?

The best choice for underwear is to wash it by hand or soak it in cold detergent. The strong rotation of the washing machine will destroy the elasticity of underwear and may lead to the deformation of the steel ring. If you really don't have time or laziness to wash it by hand, please remember to put it in the laundry bag, otherwise the underwear may never be worn after these ravages.

Reference: How often do you wash women's underwear-People's Daily Online.