Histamines cause your body to respond

You first need to understand the dynamics of allergies. The offending pollen, pet dander or mold has a nasty habit of zeroing in on the mucous membranes. One grain of any of these offenders may become attached to your soft mucous membranes, in the nasal passages, triggering your immune system to produce histamines in response.
These histamines cause your body to respond to the invasion, producing reactions that cause your body to flush these unwanted invaders. The results of this flushing action are the symptoms of allergies, which are the cause of your suffering and makes it difficult for allergy relief!