Lavender oil is one of the most widely used essential oils in the world, and it has a long history of use as a natural remedy for promoting relaxation and improving sleep. Derived from the lavender plant (Lavandula angustifolia), lavender oil has a distinctive floral, herbaceous scent that many people find calming and soothing. The calming effects of lavender oil are thought to be related to its interaction with the nervous system. Research suggests that inhaling lavender oil can reduce anxiety, lower heart rate and blood pressure, and promote a state of relaxation that is conducive to sleep. Several studies have found that exposure to lavender scent before or during sleep can improve sleep quality, increase the proportion of deep sleep, and reduce nighttime awakenings. Lavender oil can be used in several ways to support sleep. Aromatherapy diffusers disperse the scent into the air, creating a calming bedroom atmosphere. A few drops placed on a pillow or added to a warm bath before bedtime are also popular methods. Lavender-scented sprays, sachets, and candles are other accessible options. While lavender oil is generally considered safe, it should not be ingested unless under medical guidance, and undiluted application to the skin can cause irritation. Diluting lavender oil in a carrier oil such as jojoba or sweet almond oil before skin application is recommended. Lavender oil is not a cure for serious sleep disorders, but it can be a pleasant and effective complement to other good sleep hygiene practices for those looking for a natural way to support better sleep.