Lavender essential oil has a calming scent which makes it an excellent tonic for the nerves and anxiety issues. Beautiful, pungent lavender has been shown to be helpful in treating migraines, headaches, depression, nervous tension and emotional stress. The refreshing aroma removes nervous exhaustion and restlessness while also increasing mental activity. It has a well-researched impact on the autonomic nervous system, which is why it is frequently used as a treatment for insomnia and also as a way to regulate heart-rate variability.