Powders have long been used for their drying properties. Two such -- baking soda and cornstarch -- serve a variety of around-the-house purposes, from brushing teeth to drying out oily hair. They also work great on the sores that come from genital herpes [source: Grayson].
Either remedy, both of which are common, inexpensive and available at your local supermarket, can be applied to open sores. The idea is to keep the area as dry as possible to promote faster healing [source: ASHA].
Using a cotton ball, pat baking soda or cornstarch on the sores to dry them out and decrease itching.
Though it should be common sense, just be careful not to double dip: You don't want to contaminate the unused baking soda/cornstarch [source: Grayson].