What is the first action taken when treating a cut or gash on a person's arm?

The appropriate first action when treating a cut or gash on a person's arm is to wash the cut with soap and water. This step is crucial because it helps to remove dirt, debris, and bacteria from the wound, significantly reducing the risk of infection. Cleanliness is paramount in wound care; washing the affected area thoroughly with mild soap and water helps to ensure that healing can begin effectively.

Applying ice directly to the wound is not recommended as an initial step because it can further damage tissue and does not address the main concern of cleaning the wound. Placing gauze pads on the cut is important for covering and protecting it, but it should come after the wound has been cleaned to ensure that any contaminants are not trapped inside. Leaving the cut open to air is also not advisable, as it can expose the wound to more bacteria and environmental factors that may hinder healing. Thus, washing the cut is the critical first action that sets the foundation for appropriate wound care.