Which type of shock is caused by an allergic reaction?

Anaphylactic shock is a severe, potentially life-threatening allergic reaction that occurs rapidly after exposure to an allergen. This type of shock is characterized by a release of histamines and other chemicals from the immune system, leading to widespread vasodilation, increased capillary permeability, and bronchoconstriction. As a result, blood pressure drops significantly, and tissues may become deprived of oxygen, which can lead to serious complications if not treated promptly.

In contrast, cardiogenic shock relates to the heart's inability to pump blood effectively, often due to conditions like a heart attack. Septic shock arises from severe infections that lead to systemic inflammation and vasodilation. Neurogenic shock is typically a result of damage to the spinal cord, leading to a loss of sympathetic nervous system tone, which also causes vasodilation but is not associated with allergic reactions. Anaphylactic shock specifically highlights the immune system's reaction to allergens, making it the clear choice in this scenario.