The physiologic mechanism causing the wound to become red, hot, and swollen is an acute inflammatory response, which is triggered by tissue injury and is essential for healing (Braun & Anderson, 2017). Tissue injury requires a response at the level of the blood vessel near the injury, so clotting can occur. Attracting the sufficient number of clotting factors and healing factors to the site of the injury to help prevent infection is key (Braun & Anderson, 2017).
