Shows of embarrassment can be expressed in two ways: blushing and reddening. Blushing is the involuntary reddening of the face due to increased blood flow, often caused by a feeling of shame or embarrassment. Reddening is a similar phenomenon, but it can also refer to the reddening of other parts of the body, such as the ears or neck. Both of these reactions are physical signs of embarrassment, and they are often accompanied by feelings of discomfort.