Dry and itchy skin on the vulva may be related to the excessive use of potassium permanganate lotion, which as a strong oxidising agent is extremely bactericidal for wounds, but is not suitable for frequent use by healthy women. If such solutions are used to wash the vulva excessively, or if the concentration of the prepared solution is too high, it can lead to dry and itchy skin and other abnormalities.
In addition, the sharp drop in oestrogen levels in women after menopause can also cause dry, itchy vulvar skin and vagina, and hormone replacement therapy may be considered under medical supervision.