Rash/dry skin, itchy around vaginal area-assume from chaffing, . working in malaysia so it is very hot and always in the sea. what cream should i use?

Rash: This could be yeast infection as well w the heat and moisture. I would try an antifungal cream first.

Itchy vulva: My advice is to avoid tight clothing, wear white cotton panties and obtain a cream like mycolog which contains an antifungal,antiyeast medication combined with a cortisone type medication which relieves irritation and itching.Hopefully you won't have to visit a gynecologist.