What is the first line of action to control external bleeding?

The most effective first line of action to control external bleeding is to apply direct pressure to the wound. This method is crucial because it helps to stabilize the bleeding by compressing blood vessels and promoting clot formation at the site of the injury. When pressure is applied directly, it can stop or greatly slow down the blood loss until further medical assistance can be obtained.

While other methods such as tourniquets, hemostatic dressings, and cold applications can also be beneficial in certain circumstances, they are typically considered secondary interventions. Tourniquets are generally used for more severe injuries when direct pressure is ineffective. Hemostatic dressings include agents designed to promote blood clotting more rapidly and should be used when simple pressure is insufficient. Cold applications may help reduce swelling and pain but do not directly address the immediate need to control bleeding.

Understanding that direct pressure is the first and simplest method to manage bleeding is critical for effective first aid response in emergency situations.