Once the vulva itches more at night, there are many reasons why this happens. For example, if the vagina is washed frequently, the mucous membrane of the vagina will break down and it will be broken, and it will cause dysbiosis of the vaginal flora. This causes abnormalities in the leukorrhea, which flows out of the vulva when lying down, causing itching of the vulva. Or when having intercourse, because the male partner’s genital foreskin is too long, some dirt remains and is not thoroughly cleaned, and when having intercourse, it causes some cross-infection, which may also cause itching of the vulva. If the hygiene of the vulva is not good, for example, the underwear is not changed in time and not washed in time, it may also cause vulvar itching. Or if you use a public toilet, it may cause itching of the vulva. Wearing chemical fiber underwear for a long time may cause itching of the vulva. If you have such symptoms, it is recommended to go to the hospital for a white belt test and use medication according to the results of the test.