Anxiety, restlessness and fainting. Nausea and vomiting. Figure 4-1 Symptoms of Shock Hypovolemic Shock Hypovolemic shock is caused by a decreased amount of blood or fluids in the body. This decrease results from injuries that produce internal and external bleeding, fluid loss due to burns, and dehydration due to severe vomiting and diarrhea. As the person falls, blood rushes back to the head and the problem is solved.
Shell shock is a psychological adjustment reaction to stressful wartime experiences.
Care for shell shock is limited to emotional support and transportation of the casualty to a medical facility. The causative agents are injection of medicines, venoms by stinging insects and animals, inhalation of dust and pollens, and ingestion of certain foods and medications. Individuals with known sensitivities carry medication in commercially prepared kits. While administering first aid to prevent or treat shock, you must remain calm. If shock has not completely developed, the first aid you provide may actually prevent its occurrence.