**2.3 Complicated wounds**

The combination of tissue defects and infections is classified as a complicated wound. It is a unique entity. Complicated wounds are affected by different types of infections. A wide tissue resection and traumatic or postinfectious etiology are a few of the causes of complicated wounds. Irrespective of the size, management, cause, and location, every wound is contaminated. The infection that develops depends on the number and type of microorganisms, virulence, the patient's inherent resistance, and the local blood supply. Heat, redness, pain, edema, and limited or loss of function of the affected part are the symptoms or the typical characteristics of infection. The wound classification is also done based on the criteria, such as degree of contamination, morphological characteristics, etiology, and communication with solid or hollow organs [6]. Wounds are also classified as open and closed. In the case of open wounds, the underlying tissue is exposed, and the skin layer is damaged. In the case of a closed wound, the skin is not severed, but the underlying tissue is damaged [7]. The image shown in **Figure 4** depicts a complicated, open, and contaminated wound.
