How should vulvar itching be treated effectively?

Patient's question:

History of previous treatment and effectiveness for vulvar itching: Used Funjianjie for cleaning and consulted about which medicine is most effective

Doctor's answer:

General treatment for vulvar itching: Pay attention to menstrual hygiene, keep the vulva clean and dry at all times, avoid scratching. Do not use hot water to rinse, avoid using soap. If there is an infection, you can use potassium permanganate solution for sitz baths, but only local washing is allowed. Clothing, especially underwear, should be loose and breathable. Avoid alcohol and spicy or allergenic foods.
Treatment for the cause: Completely eliminate the local or systemic factors that cause itching, such as trichomoniasis, fungal infections, or diabetes.