Edema means swelling from fluid that accumulates and is trapped in your body's tissues. Edema most ...
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Edema means swelling from fluid that accumulates and is trapped in your body's tissues. Edema most commonly occurs in the feet, ankles, and legs but any part of the body can be affected. The tissues of your body are made up of cells held together by connective tissue. The space between cells that contain connective tissue and tiny blood vessels is called the interstitium. The fluids in your body that are not inside cells are usually stored in your blood vessels and what are called the interstitial spaces, meaning not inside cells. Edema occurs when the tiny blood vessels or capillaries leak fluid into the surrounding tissue spaces. When the interstitial spaces fill with fluid, they expand and the area swells. There are two kinds of edema. In the type called pitting edema, applying pressure to the swollen area causes an indentation that persists after the pressure is released. In non-pitting edema, there is no persistent indentation after pressure is applied.

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