Some common causes of shock:
Most forms of shock exhibit all these symptoms and signs but occasionally, as in septic or toxic shock, the patient's hands and feet may initially be warm rather than cold and clammy as the toxins cause peripheral vasodilatation[?].
Quick diagnosis is of key importance. Resuscitation[?] should be started immediately, the modality of which depends on the patient's requirements. Virtually all patients with shock will require some kind of intravenous access; obtaining venous access quickly is of paramount importance. Most people in shock require intravenous fluids. However, under certain circumstances such as in cardiogenic shock, too much fluid can be fatal, so a knowledgeable professional rather than a lay person should make these decisions.
Shock is sometimes classified into two stages - reversible shock and irreversible shock. The distinction between reversible and irreversible shock is clinical (and sometimes retrospective) - reversible shock is potentially treatable whereas irreversible shock inevitably leads to death. Most cases of untreated reversible shock will progress to irreversible shock within about 6 hours of onset.