Which of the following is a characteristic of inflammation?

The characteristic features of inflammation include redness, heat, pain, and swelling. This cluster of symptoms is the body's natural response to injury or infection, involving an increase in blood flow to the affected area, which causes redness and heat. The accumulation of fluid and immune cells results in swelling, while the release of chemicals can lead to pain as they stimulate nerve endings. Together, these signs reflect the body’s efforts to isolate and rid itself of harmful agents, initiate tissue repair, and restore normal function.

While pus is often associated with inflammation, particularly in the presence of infection, it is not a universal characteristic of all inflammatory responses. Bleeding and coughing are not directly indicative of inflammation; bleeding typically relates more to tissue damage, and coughing corresponds to respiratory issues rather than inflammation specifically. Understanding these key aspects helps differentiate inflammation from other bodily responses.