Oregano is used for respiratory tract disorders such as coughs, asthma, croup, andbronchitis. It is also used for gastrointestinal (GI) disorders such as heartburn andbloating. Other uses include treating menstrual cramps, rheumatoid arthritis, urinary tract disorders including urinary tract infections (UTIs), headaches, and heartconditions.The oil of oregano is taken by mouth for intestinal parasites, allergies, sinus pain,arthritis, cold and flu, swine flu, earaches, and fatigue. It is applied to the skin for skin conditions including acne, athlete's foot, oily skin, dandruff, canker sores, warts,ringworm, rosacea, and psoriasis; as well as for insect and spider bites, gum disease,toothaches, muscle pain, and varicose veins. Oregano oil is also used topically as an insect repellent.