Skin flushing can be described as the experience of a sudden reddening of the skin which is usually accompanied by feelings of rushing blood and warm skin. It is a common physical response to anxiety, stress, embarrassment, anger and certain psychoactive substances. In terms of its appearance, it manifests itself in an identical fashion to that which occurs across the face when one is embarrassed. Blotchiness or solid patches of redness are also often visible when blushing.
Substances which may cause this effect include: