Because the attention span is more focused in the dead of night, the itching symptoms are felt to be pronounced. It is possible that a woman is not paying attention to what she wears, especially underwear that is not breathable and does not absorb sweat, leaving the vulva in a moist environment for long periods of time, leading to itching.
Irritation of the skin by menstrual blood or unwiped urine, faeces, sweat stains, etc., leads to chronic inflammation of the vulvar skin, which can also cause itching to worsen at night.
In addition, suffering from other inflammatory diseases, such as bacterial vaginitis and inflammation of the cervix, can also cause increased vaginal discharge and cause symptoms of vulvar itching. The symptoms may not be noticeable when women are distracted by work during the day, but may worsen at night when they fall asleep.