What Cause Your Nose Runs ?


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Histamine is usually stored in granules inside mast cells. When a mast cell is exposed to a substance that triggers an allergic reaction, however, the cell releases its histamine into surrounding tissues.

Nose Runs

Nose Runs

Histamine plays an important role in certain types of allergic reactions. It causes small blood vessels to widen and become more permeable to fluid, allowing fluid to pass from the bloodstream into sur­rounding tissues, causing nasal congestion, runny eyes and nose, and some­times hives. Read the rest of this entry »