Hyperemia (also known as Hyperemias, Venous Engorgement): The presence of an increased amount of blood in a body part or an organ leading to congestion or engorgement of blood vessels. Hyperemia can be due to increase of blood flow into the area (active or arterial), or due to obstruction of outflow of blood from the a

NIH MeSH · D006940Diseases

Hyperemia

Also known asHyperemias · Venous Engorgement · Engorgement, Venous · Passive Hyperemia · Hyperemia, Passive · Venous Congestion · Congestion, Venous · Active Hyperemia · Hyperemia, Active · Arterial Hyperemia · Hyperemia, Arterial · Reactive Hyperemia

Definition

The presence of an increased amount of blood in a body part or an organ leading to congestion or engorgement of blood vessels. Hyperemia can be due to increase of blood flow into the area (active or arterial), or due to obstruction of outflow of blood from the area (passive or venous).

MeSH classification

  • C14.907.474

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Common questions about Hyperemia

What does Hyperemia mean in medicine?
The presence of an increased amount of blood in a body part or an organ leading to congestion or engorgement of blood vessels. Hyperemia can be due to increase of blood flow into the area (active or arterial), or due to obstruction of outflow of blood from the area (passive or venous). This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.
Is Hyperemia known by any other names?
Yes. Hyperemia is also referred to as Hyperemias, Venous Engorgement, Engorgement, Venous, Passive Hyperemia in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.
Where does Hyperemia sit in the medical classification?
Hyperemia falls under the broader medical category "Diseases" in the MeSH hierarchy (tree numbers: C14.907.474). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.
Where can I get a plain-language explanation of Hyperemia?
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Source: NIH MeSH 2026 (D006940) — National Library of Medicine, public domain. View official MeSH record ↗