Shock is a serious condition caused by a sudden reduction in blood flow throughout the body. Shock can be caused by trauma, heat stroke, blood loss, allergic reactions, severe infections, poisoning, severe burns, or other causes. When a person goes into shock, the organs are not getting enough blood and oxygen. Left untreated, it can lead to permanent organ damage and even death.

The signs and symptoms of shock depend on the situation and may include:

• cool sticky skin

• pale or gray skin

• A bluish tinge (or gray if you have dark skin) on your lips and nails

• rapid pulse

• fast breathing

• nausea or vomiting

• Pupil dilation

• weakness or fatigue

• dizziness or fainting

• Changes in mental state or behavior, such as anxiety or restlessness