The reason why this narrowing of the airways occurs is not well understood in the medical world, but, mechanically, the narrowing process can be seen and known with certainty, which is currently experiencing an asthma sufferer "asthma attack", then the airway becomes narrower.
Several types of triggers constriction is already known, for example pollen, dust, animal dander, smoke, cold air, exercise activities, and so forth. Certain cells in the airways, particularly mast cells thought to be responsible for the beginning of this constriction.
Mast cells throughout the bronchi releasing materials such as histamine and leukotrienes that cause: smooth muscle contraction, and an increase in mucus formation, and the transfer of certain white blood cells into the bronchi. Mastocyte removing such materials as a response to something that they know as a foreign body (allergens) such as pollen, fine dust contained in the house, or animal dander.
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| Image By 7mike5000 via Wikimedia Commons |
The occurrence of asthma attacks then generates a chain reaction, then the irritated airways causes the smooth muscles of the bronchi in the walls of the airways tighten, the tissue that lines the airways have swollen due to inflammation or inflammation, and the release of mucus into the airways.
This reaction results in narrowing of the diameter of the airway narrowing that occurs that causes asthma sufferers should make every effort to breathe. In some cases, this airway even covered at all. Thus, these are some of the causes of asthma attacks, may be useful for you.