Anaphylaxis

Anaphylactic shock or anaphylaxis is a typically severe, and sometimes fatal, systemic reaction in a susceptible person exposed to a particular antigen after previous sensitization.

Signs and symptoms
Anaphylactic shock typically causes:
 * breathing problems
 * fainting or loss of consciousness
 * fast heartbeat
 * itching
 * hives
 * skin rash
 * swelling / inflammation, typically involving airways
 * weak pulse

Learn more

 * Anaphylaxis - NHS
 * Anaphylaxis - British Society for Immunology