renal diseases that cause fluid retention.diseases that make the heart beat rapidly.The causes of hyperemia vary depending on whether it is active or passive. Share on Pinterest Inflammation and exercise may be causes of active hyperemia. This occurs when there is a decreased outflow out of the blood vessels. However, if the blood flow in the heart is being impeded, then it will affect the whole system. This is the most common form of hyperemia.Īlso known as congestion, passive hyperemia can be either acute or chronic.Ĭhronic passive hyperemia usually occurs in the organ systems of the lung, liver, and lower extremities. Acute local active hyperemia: When there is an increased amount of blood in a local area such as the leg, stomach, or lung.Acute general active hyperemia: When there is increased blood flow throughout the body.The two different types of active hyperemia are: Increased blood flow and redness occur when there is a demand for oxygen and nutrients in a particular area. It is an acute form of hyperemia.įor example, there is more blood in the digestive system after a meal, more blood in the muscles after exercise, and more blood in the face when a person blushes. Active hyperemiaĪctive hyperemia is a physiological response to something happening in the body. Hyperemia can be acute or chronic, meaning it can happen quickly and for a short time or may persist over a longer term. These types can then be further divided into local hyperemia (meaning in a specific area) or general hyperemia (affecting a whole system in the body). Hyperemia can be broken down into two types: active and passive.

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