Which of the following symptoms might indicate fluid overload?

Edema is a primary symptom that indicates fluid overload in the body. When there is too much fluid in the tissues, it leads to swelling, which is characteristic of edema. This condition occurs because the excess fluid accumulates in interstitial spaces, causing visible swelling in areas such as the legs, arms, and abdomen. In clinical practice, observing edema can be crucial for identifying patients who may be at risk for complications associated with fluid overload, which can occur in heart failure, kidney disease, or after excessive fluid administration.

The other options highlight conditions that do not align with fluid overload. Dehydration presents with a deficit of fluid in the body, while rapid weight loss typically signifies fluid loss rather than gain. Decreased urination can occur in various conditions but is not a direct indicator of fluid overload; rather, it may point to fluid retention or kidney dysfunction. Therefore, edema stands out as a clear indicator of fluid overload.