What is a common characteristic of edema?

Fluid retention resulting in swelling is a defining characteristic of edema. This condition occurs when excess fluid accumulates in the tissues, leading to noticeable swelling in areas such as the legs, ankles, or abdomen. Edema can arise from various causes, including injury, inflammation, or underlying medical conditions that disrupt the balance of fluids in the body.

Other symptoms or characteristics may accompany edema, but they do not define it. For instance, redness of the skin, formation of blisters, and rough skin texture are signs that may be associated with different skin conditions or injuries but do not specifically relate to the condition of edema itself. In contrast, the hallmark of edema is purely the presence of swelling due to retained fluid, making this understanding crucial for identifying and managing the condition effectively.