Scientific laws are considered established and universally applicable (to certain class of things or phenomenon under appropriate conditions) but not necessarily definitive. Also called laws of science.
3. Eucalyptus Oil â there are a few different types. In the absence of R.C. oil, grab any kind of eucalyptus that you have and diffuse for congestion relief. 4. Thieves Oil â I donât even know where to start with Thieves oil because it helps with just about everything.
Ways to Use Essential Oils for Cough. 1  1. Add Essential Oils to a Diffuser. 2  2. Using Lozenges to Treat a Cough. 3  3. Make a Balm. 4  4. Use Tissue Aid to Relieve Congestion. 5  5. Mix Lemon and Eucalyptus Oils. 6  6. Try Massage Oil. 7  7. Gargle with Salt Water. 8  8. Try a Hot Bath.