Wrapping the whole limb, rather than just above the bite site, is essential for managing a snakebite because it helps to immobilize the venom and prevent it from spreading through the lymphatic system. The lymphatic system, which is responsible for transporting lymph fluid throughout the body, does not rely on the heart to pump fluid, but rather on muscle movement. By wrapping the entire limb, you can effectively slow down the movement of venom by reducing muscle activity and constricting lymphatic flow. This gives the patient more time to reach medical care, where they can receive the appropriate antivenom treatment.

If you only apply a bandage above the bite, venom can still spread through the rest of the limb and continue to circulate, potentially reaching vital organs. Comprehensive immobilization of the limb also helps prevent further movement that could increase venom absorption.