I had never read about that one either but I just did a little research and found a couple sites that talk about ingesting coconut oil to fight yeast infections and also coating tampons
and making suppositories or like this one...
VAGINAL BOLUS FOR YEAST INFECTIONS
Herbal boluses are old-fashioned remedies used for persistent vaginal infections. By changing the herbal formula, you can adapt them for several different problems, including cysts, fibroids, and tumors. The following mixture has had a high success rate for yeast infections. Boluses are easy though messy to make and will take a little time. But they are well worth the trouble because they are very successful in clearing persistent infections.
* 1 cup coconut oil,
* A few drops of tea tree oil,
* 3 parts slippery elm powder,
* 1 part pau d'arco powder,
* 1 part black walnut hull powder,
* 1/2 part goldenseal powder,
* 1 part myrrh powder (finely ground).
To ensure that the herbs are finely powdered, run them through a nut grinder and a fine sieve. Melt the coconut oil in a saucepan over low heat. When the oil is completely melted, remove it from the heat and stir in the powdered herb mixture. Add enough herbs to make a thick paste. When you have added enough powder so that the oil is thick yet still pliable enough to "work," add the tea tree oil. Quickly roll into boluses the size and shape of your small finger. They will look like herbal tootsie rolls.
Each evening, insert one bolus as far as possible up into the vagina. For easier insertion, you may wish to use a tampon inserter. It will probably be necessary to wear panty liners while doing this treatment. As the coconut oil melts, the bolus may drip.