Nature's Body Shop Get Gorgeous Naturally ! Benefits of Blue Cypress Oil. Blue Cypress essential oil is a natural mosquito repellent and natural remedy for dry skin. It is also a herpes natural remedy, is used to combat human papilloma virus (hpv), and other viral infections including chicken pox. The Australian Aborigines burned the heart wood to repel mosquitoes and midges; and also used it to moisturize dry skin in the desert environment. The oil is a magnificent azure blue color! This comes from guaiol and guaiazulene which are known as potent anti-inflammatory constituents.