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Erythema is redness of the mucous membranes or the skin, usually resulting from a skin injury, inflammation, or an infection. Some types of erythema, such as nervous blushes, don’t result from a condition at all. The root cause of erythema is hyperemia in the superficial capillaries: an increase of blood flow in the blood vessels close to the surface of the skin. There are many different types of erythema. Most are common issues such as sunburns, allergic reactions, or eczema. However, there are several rarer and more distinct types of erythema as well.

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1. Blushing

Many people blush when they are nervous, embarrassed, passionate, or angry. Individuals with social anxiety may blush more often and severely. While blushing is a minor form of erythema, people who regularly experience extreme facial blushing may have a more dramatic type -- idiopathic craniofacial erythema. Though physicians don’t entirely understand the causes behind blushing and idiopathic craniofacial erythema, they realize that causes are primarily psychological with some possible physiological influences. Generally, treatment involves therapy to help the patient handle the causes and effects of their blushing.

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