Shock is a life-threatening medical condition caused by several factors such as sepsis, allergic reactions, heart damage, fluid loss, spinal cord trauma, and low blood sugar. Symptoms include low blood pressure, rapid or shallow breathing, pale skin, rapid or weak pulse, dizziness, and fainting. Treatment depends on the underlying cause but generally involves intravenous fluids and medications to raise blood pressure. Prevention focuses on avoiding heart disease, injuries, dehydration, and other shock-inducing conditions.