At best, coconut oil could do nothing, which would prolong the misery of your yeast infection. But Dr Minkin cautions that trying to use coconut oil as a remedy might actually make your yeast infection worse — and that's definitely not a favourable outcome. According to a blog post from River Place , coconut oil can create a biofilm in your vagina, essentially a layer that protects fungus and bacteria from being easily washed away. It may mess with your vaginal pH or microbiome too, which can up your risk of a future infection.