What is psychogenic shock. in detailed please :)?

Fainting: Psychogenic shock is a physiologic response of the body to a perceived overwhelming emotional stress. The blood vessels dilate, reducing blood flow to the brain. Blood pressure then drops, resulting in dizziness, light headedness, and/or nausea. The skin becomes sweaty, and pulse rate increases. Recovery consists of lying flat or having head slightly lower than rest of the body. Hope this helps.