Menthol has pain-relieving and anti-inflammatory actions. Also related to its expectorant actions, which involves thinning and loosening mucous congestion. It's also a well-known mouth refresher.
(2) Mint Oil
Mint Oil acts as an expectorant, helping to open your airways, clear mucus and reduce congestion. It also has antimicrobial, antiviral and antioxidant properties.
(3) Eucalyptus Oil
Eucalyptus oils has the ability to stimulate immunity, provide antioxidant protection and improve respiratory circulation.
(4) Thyme and Rosemary Oil
Thyme essential oil has powerful antibacterial abilities against common antibiotic-resistant strains of bacteria. Rosemary contains the compound cineole, A study published in the journal "Cough" found that cineole may help to break up mucus and reduce inflammation.