Final answer:
The warm, tender, and reddened area on the right calf could be caused by infection and inflammation.
Step-by-step explanation:
The most important contributing factors to a warm, tender, and reddened area on the right calf would be infection and inflammation. Infection occurs when microorganisms, such as bacteria, enter the body and cause harm. In this case, the localized infection at the surgical site is likely causing the warm, tender, and reddened area on the right calf. Inflammation is the body's response to infections or injuries and can cause redness, warmth, and pain. The chemicals released during inflammation attract white blood cells to the area, causing them to leak out of blood vessels into the tissue, which further contributes to the warmth, tenderness, and redness.