May promote relaxation
Eucalyptus is commonly thought to alleviate stress symptoms. In one study, 62 healthy adults who inhaled eucalyptus oil saw significant decreases in pre-surgery anxiety. Eucalyptus contains eucalyptol, which has been shown to be anti-anxiety.
Furthermore, breathing eucalyptus oil for 30 minutes has been linked to reducing blood pressure in individuals recovering from knee surgery, suggesting that it has a relaxing impact. It is thought to reduce the activity of your sympathetic nervous system — your stress response system — while increasing the activity of your parasympathetic nervous system, which promotes relaxation.