Boric acid is a natural antiseptic, anti-fungal agent, and astringent. A teaspoon of boric acid in four ounces of distilled water makes a good wash for wounds, rashes, minor burns, or as an acne treatment. It also relieves the itch from insect bites. A teaspoon in four cups of water can be used to treat sore eyes, irritation, or weird eye discharges