9. Eucalyptus for Nasal Congestion
Eucalyptus oil is a classic remedy for stuffy noses and sinus congestion. When inhaled through steam or used in vapor rubs, its key component—eucalyptol—helps open nasal passages and reduce sinus inflammation. Research supports its effectiveness in easing symptoms of sinusitis, making eucalyptus a natural, science-supported choice for clearer breathing. [Source: NIH]