The most effective local early treatment for venomous snake bites is to block the blood flow near the wound immediately, to avoid systemic poisoning caused by the toxin spreading to the whole body through blood vessels, which may lead to serious life-threatening symptoms. The way to stop the blood flow is to tie the limb at the proximal end of the wound, usually with a plate bandage. After stopping the blood flow, it is necessary to squeeze the wound as much as possible to make the local blood flow out, and also expel the toxin out of the wound as much as possible. The best way to draw out as much blood as possible is to use a fire pot or suction device if possible. It is not recommended to suck the blood out of the mouth, because inevitably some people have small localized injuries to the mucous membranes of the mouth or the gums, which can also lead to poisoning through these mucous membrane injuries.