what causes blushing
Causes of blushing. Blushing is caused by your sympathetic nervous system â the network of nerves responsible for triggering your 'fight or flight' reflex. This is a series of involuntary physical changes to your body when faced with a stressful or dangerous situation.his increases the blood flow to your skin, producing the redness associated with blushing. In addition to emotional triggers, other causes of blushing can include: 1  alcohol.
This increases the blood flow to your skin, producing the redness associated with blushing. In addition to emotional triggers, other causes of blushing can include: 1  alcohol.2  hot or spicy foods. 3  hot drinks. 4  a high temperature (fever).5  sudden hot or cold temperatures. 6  strenuous exercise.his increases the blood flow to your skin, producing the redness associated with blushing. In addition to emotional triggers, other causes of blushing can include: 1  alcohol.