Exudation

Exudation (from Latin ex - from and sudare - sweat to flow) is the process of formation of flows of inflammatory exudate from dilated blood capillaries, which over time, under the influence of severe itching, perforate and form microchannels for the penetration of fluid through the wall of post-capillary venules.

The release of fluid from dilated blood capillaries is the primary stage of inflammation. Exudative inflammation occurs more intensely,