A dangerous drop of blood pressure with symptoms of insufficient blood flow to different body organs. Clinical symptoms include: pallor, profuse sweating, cold and moist skin, rapid and weak pulse, irregular respiration, reduced urine output, altered consciousness state and even death.

Causes of shock may include: severe damage to the pump function of the heart (Cardiogenic shock), massive loss of fluids (Hypovolemic shock) due to massive bleeding or desiccation, severe allergic reactions (Anaphylactic shock), severe infections (Septic shock) and severe damage to the nervous system (Neurogenic shock).