allergy symptoms allergy symptoms can be mild moderate for severe .explain this
Answers
Explanation:
The first time an allergy-prone person is exposed to a specific allergen (such as pollen), the body responds by producing allergic (IgE) antibodies. The job of these antibodies is to find molecules of the offending substance in the bloodstream and tissues and to usher them to the body's mast cells (a type of white blood cell) for destruction. As the mast cells destroy the allergens, a chemical called histamine is released into the bloodstream. A large amount of histamine swells body tissues (inflammation), causes itching, enlarges blood vessels, increases secretions, and causes bronchospasm (tightening of muscles that surround the airways).
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Answer:
allergy symptoms can be classified is mild, moderate or severe: mild reactions include local symtoms (affecting a specific area of the body) such as a rash or hives; itchiness, watery/ red eyes, hay fever and runny nose. Mild reactions do not spread to other parts of the body.