Which type of shock is caused by an allergic reaction?

Anaphylactic shock is a severe and potentially life-threatening allergic reaction that can occur rapidly after exposure to an allergen. This type of shock is characterized by the release of a large amount of histamine and other chemicals into the bloodstream, which leads to widespread vasodilation (the widening of blood vessels) and increased vascular permeability. As a result, blood pressure drops dramatically, and blood flow to vital organs is compromised.

Patients undergoing anaphylactic shock may experience symptoms such as difficulty breathing, swelling of the face and throat, hives, and gastrointestinal distress. Immediate recognition and treatment, typically with epinephrine, are critical to reversing the effects of the reaction and stabilizing the patient. The distinct link between anaphylaxis and shock underscores the importance of quick identification and management of allergic reactions in emergency medical situations.

The other options refer to different types of shock that have distinct causes and mechanisms unrelated to allergic reactions.