Inhaling tea tree essential oil is a common practice that offers various benefits. When the oil is diffused or inhaled directly, its aromatic molecules are taken into the lungs and dispersed into the bloodstream. This allows the therapeutic properties of tea tree oil to take effect more rapidly than other methods of application. Inhaling tea tree essential oil can help with respiratory issues such as congestion or coughing, as well as provide a refreshing and invigorating scent that promotes mental clarity and alertness.