FOAM COMES IN THE MOUTH AFTER SNAKE-BITE AND THE BODY CHANGES INTO BLUE COLOR- WHAT ARE THE REASONS:
Foam will not come in the mouth, as shown in cinema but the poison of the snakes like Cobra and the Asp will deactivate the veins. So, the saliva secreted in the mouth always cannot be swallowed. Thus the saliva comes out of the mouth. So, it looks like foam is coming out
When it looks like foam coming out of the mouth, the doctor realizes that a poisonous snake like Asp has bite. Poison of Glass Cobras has the poisonous quality of degrading the blood.
If the blood vessels are degraded, oxygen required for all parts of the body will not go. Blood which has low quantity of oxygen gives blue color to the blood and this gives blue color to beneath the body.