Which condition may result in tissue edema?

Tissue edema occurs when there is an accumulation of excess fluid in the interstitial spaces of the tissues. The ingestion of a large amount of salt can lead to tissue edema because sodium attracts water. When a person consumes a significant amount of salt, the body retains water to balance the sodium levels, causing an increase in blood volume and increased pressure in the capillary beds. This can result in fluid leaking out into the surrounding tissues, contributing to edema.

In contrast, excessive exercise and increased physical activity typically do not lead to edema, as these activities promote circulation and fluid movement. Low fluid intake tends to reduce the overall fluid in the body, which would not directly cause edema, but could lead to dehydration instead. Therefore, the condition most directly associated with causing tissue edema is the ingestion of a large amount of salt due to its effect on fluid retention.