Question

what is the cause of oozing out of foul smell from any dead body

Answer 1

Decomposing or decomposed bodies by the bacteria and microorganisms cause the chemicals to be broken down into the body and releasing them. Thus, releasing a pungent smell from the dead body.

Answer 2

The reason behind the foul smell produced by a dead body  is because of the microbial attack on the cells and tissues and breaks them down into gases and salts.

It is said that the odour produced by a dead body consists of more than 400 volatile organic compounds in a complex mixture. When microbes attack a dead body, larger molecules starts breaking down into smaller ones, for example when protein break downs into smaller amino chains, it release two compounds known as adaverine and putrescin