Does Asthma Cause Phlegm?

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Asthma Trigger Versus Asthma Cause

One thing that I've realized by reading the works of various asthma writers is that there doesn't seem to be a consistent definition of a cause and trigger.  Today I would like to standardize these two terms so that there is no further confusion.


The word "asthma trigger" is not the problem.  A trigger is anything that sparks an asthma attack.  A good example of a trigger is any allergen, such as dust mites, cockroach urinie, molds, fungus.  Other triggers are cold weather, stress,...

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