Mastic essential oil is steam distilled from the wild-crafted oleoresin of the mastic tree, which is native to the Mediterranean region. It is used in skin care products to treat boils, cuts, wounds and ringworm. Mastic has a fresh, balsamic fragrance similar to pine. It is anti-inflammatory, antibiotic, antimicrobial, antiseptic, astringent, expectorant and diuretic. It is used to treat arthritis and bronchitis. It is also used as an insect repellent.