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What happens to the body during an anaphylactic reaction?

During an anaphylactic reaction an allergic response occurs to the trigger that a person is exposed to, and a protein called histamine is released from different tissues in the body. This quickly causes the symptoms of anaphylaxis including hives, swelling, dilated blood vessels with a drop in blood pressure, nausea, vomiting, and difficulty breathing. This is a life-threatening emergency that requires immediate medical attention. 

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.