Our brain is such an awesome system that it handles everything in our body, besides physically movements, we can control our emotions and thinking. So how does it work?

The Limbic System – a set of brain structures located on the both sides of the thalamus, immediately beneath the medial temporal lobe of the cerebrum primarily in the midbrain.

As you can see from the picture above, different part of the limbic system translate different messages in our brain. Amygdala manages our emotions and its nearest to the olfactory bulb, which handles smell. With the close relation for Amygdala and Olfactory bulb, smells also greatly affects our emotions! That explains how inhaling essential oils helps to uplift our mood and calms our emotion.

Reference: https://en.wikipedia.org/wiki/Limbic_system