There are a number of factors that affect the
dilatation or relaxation of the airways.
For example, the airways can constrict or become narrower due to
exposure to cold, allergens, certain types of medication, etc. One of the things that causes airways to
narrow is a reduction in the internal production of natural steroids within the
body. The production of these steroids,
usually produced by the adrenal gland found next to the kidneys, is lowest late
at night and in the early hours of the morning.
Therefore, asthmatic symptoms are thought to be more common during this
period. However, more importantly,
shortness of breath during this period reflects poor asthma control and this
means that you should see your doctor about adjusting your medication or
looking into why this might be happening.
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