Essential oils can be used through inhalation, which is the fastest route for them to enter the body. When inhaled, the oil’s molecules travel through the olfactory nerves in the nose directly to the brain. This process allows the brain to quickly send signals via the nervous system to areas experiencing pain, stress, or anxiety. Aromatherapy is widely used for emotional and physical well-being because of this direct connection between scent and neurological response.

There are several ways to use essential oils through smell. A diffuser is one of the most effective methods, dispersing tiny oil particles into the air for continuous inhalation. Another method is to inhale directly from the bottle or cap, which provides a quick and concentrated dose of aroma. Additionally, placing a few drops in the palms of your hands, rubbing them together, and cupping them over your nose allows for a personal and immersive experience. This method is particularly useful for on-the-go relief from stress, fatigue, or congestion.

Lemon essential oil (Citrus limon) is a popular choice for aromatherapy due to its uplifting and refreshing scent. It is commonly used to boost mood, improve focus, and cleanse the air. However, caution should be taken when using lemon oil topically, as it can cause extreme skin irritation and increases sensitivity to sunlight. If applied to the skin, it is recommended to avoid direct sunlight for up to 12 hours to prevent burns or irritation. Despite this, lemon oil remains a versatile and beneficial essential oil for both aromatic and topical applications.