Allergic Reaction

Allergic Reaction: What is it?

allergy Click to Flip
A hypersensitive immune response to a substance

When it occurs?

allergy Click to Flip
An allergic reaction can occur when the immune system attacks a normally harmless substance.

Mechanism

Allergic Click to Flip
This chemical release is irritating and causes itching and swelling mast cells release a variety of strong chemicals, including histamine, into the tissues and blood.

Allergic reaction leads to

Allergic reaction leads to Click to Flip
This is how hay fever and allergic pink eye (conjunctivitis) occur. lung airway narrowing and throat tightening, as is found in asthma, as well as to loss of voice.

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December 12, 2019

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