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The general outline of this therapy can be found here: Best natural cough treatment. This is the way how you can stop coughing for good. An additional factor to stop coughing naturally is to use Earthing for grounding the human body to get Earth's electrons to reduce inflammation.
Apply a 1% to 2% wintergreen essential oil/carrier oil blend to the chest and throat to quiet coughs. It will stop the muscle spasms and soothe the throat. Wintergreen aromatherapy can also be beneficial for excessive coughing.