Eucalyptus oil steam
This can be very helpful to eliminate a cold or cough.
Simmer some water in a pot on the stove. Do not use a diffuser for this - the steam from the diffuser is not strong enough. Most patients like bigger pots for more surface area. Once the water is simmering put 15-20 drops of Eucalyptus essential oil in the water and breathe in the steam for at least 5 minutes. I want it so strong that you cough on the first few breaths. Do this for 1-2 weeks or until all symptoms resolve. You can do this up to 3 times per day for maximum benefit. The Eucalyptus oil is antibacterial, antifungal and antiviral.