Which of the following is NOT one of the cardinal signs of inflammation?

The cardinal signs of inflammation are key indicators that help identify inflammation in tissues. These signs typically include pain, heat, redness, and swelling. Each of these elements plays a vital role in the body's response to injury or infection.

Pain is a direct result of the inflammatory processes and serves to signal an issue to the body. Heat arises from increased blood flow to the area, which is a response to the inflammatory mediators that enhance circulation. Redness is also tied to increased blood flow, as vessels dilate to bring more immune cells to the site of damage or infection. Swelling occurs due to the accumulation of fluid and immune cells in the affected area, a process that helps deliver essential nutrients and provides an environment for immune response.

Itching, while it may occur with certain types of inflammation or irritation, is not considered a cardinal sign of inflammation. It is more often associated with allergic reactions or conditions affecting the skin. As a result, itching is not included in the traditional list of cardinal signs that characterize the acute inflammatory response.