Coconut oil is not known to cause yeast infections. In fact, coconut oil has antifungal properties that may help prevent and treat yeast infections. However, if you are prone to yeast infections, it is important to note that coconut oil is a type of oil and can potentially disrupt the natural pH balance of the vagina, which can increase the risk of infection. It is recommended to use coconut oil in moderation and to consult with your healthcare provider if you have concerns.