Ayurherbshub Essential oils have many health benefits, from aromatherapy to topical healing. Whether used for massage therapy or to improve mood, rosemary essential oil is great to have on hand. Rosemary essential oil is great for improving brain function. Using an oil diffuser, rosemary aromatherapy were more alert and had improved memory. Rosemary essential oil aromatherapy is also great for managing stress levels.Rosemary essential oil is also beneficial to reduce inflammation. People suffering from inflammation disorders, including rheumatoid arthritis, are recommended to massage a rosemary blend to their swollen joints. Applying this blend will also relieve joint pain, making everyday activities manageable.