Hypovolemic, septic, and cardiogenic shock are three types of shock discussed in the document. Hypovolemic shock occurs due to reduced circulating volume from external or internal bleeding or fluid losses. Septic shock results from toxins released during bacterial infections. Cardiogenic shock is caused by decreased cardiac output due to conditions like heart attacks or heart muscle damage that impair the heart's ability to pump effectively. Treatment for the different shock types involves immediate control of bleeding, fluid resuscitation, antibiotics for infection, and vasopressors or inotropes to support blood pressure and cardiac function.