Which action is essential when treating a bleeding wound?

Applying pressure to the wound is essential when treating a bleeding wound because it helps to control the bleeding by applying direct force to the injured area. This method can aid in clot formation, which is critical in stopping the blood flow. Effective pressure can prevent further blood loss and allows time for professional medical treatment to be administered.

In situations involving serious bleeding, it is vital to address the issue promptly, as significant blood loss can lead to shock or other severe complications. Therefore, the immediate application of pressure is a key first aid step in injury management.