5. Oregano Oil
Oregano oil purifies the lungs and the air passages. It weakens the secretion and eradicates infection-causing microorganisms and diseases. It is the rosmarinic acid in this oil that is to be hailed for successful assistance during an asthma attack or at least acts as preventive measure. This acid assists in the reduction of lung fluid build up, including not not limited to swelling which often occurs during an asthma attack. In a sense it is considered a natural anti-histamine as it does reduce this compound dramatically, making it easier to breathe more naturally without too many inhibitors.
Histamines are released by the bacteria found in air which can cause the blocked noses, coughing and wheezing. So the aim is to clear these pollutants from the air, though using oregano oil in an infuser. You can have this in your home along with an air purifier to assist in preventing asthma by creating a clean air breathing environment.