Here are few tips:
Bland moisturisers (emollients) without added perfumes such as aqueous cream or emulsifying ointment can help to ease the itch, whatever the cause.
Wear loose 100% cotton underwear.
Avoid wearing tight-fitting clothes
Wash your vulva gently, once a day. Over-cleaning may make symptoms worse. Use unscented soap.
Avoid perfumed lubricants.