Hyperemia Inflammatory

**Hyperemia** is a process of increasing the permeability of microcirculatory vessels and increasing the amount of blood in the tissues, accompanied by vasodilation (edema) due to an increase in fluid volume while maintaining the overall function of the capillaries. It occurs as a result of a disorder in the regulation of the functions of the endothelial vascular walls and develops under the influence of various causes. It can be both physiological (adaptive, after injury) and pathological (inflammatory).

There are acute and chronic hyperemia. Acute hyperemia (15-20 minutes) in turn is divided into increased - over 30 minutes - and transient.

Chronic inflammatory hyperemia occurs with inflammation, congestive hyperemia, lymphatic dermatitis, allergic skin disease, and sometimes with collagenosis. In some cases, chronic hyperemia is characterized by a persistent pink coloration of the skin and mucous membranes with overall pallor. Transient hyperemia is observed with external overheating of the body, venous hyperemia in frostbitten skin of the hands, limbs with false anatomical edema. In acute and chronic hyperemia, depending on the speed of development, there may be facial hyperemia - within 3-5 minutes, marching hyperemia and hyperemia during the period of temperature rise. The increase in the duration of acute hyperemia is due to the fact that in