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This is caused by the dilation of blood vessels in the face and neck, which allows blood to rush to the head. This, in turn, causes the skin to feel warm and turn red. Generally, people with fair skin and younger people are most susceptible to hot face and ears caused by 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.