Dr Kalpesh Gajiwala, a burns specialist at the Tata Memorial Hospital in Mumbai, said it was surprising that it happened to a child in a village, where children are usually breastfed and breast milk, would rarely ever be converted to methane.
"A plausible hypothesis for SHC is that some bacteria, such as the methanogenic micro-organism-archaebacteria, in the intestine convert the food into methane, which is a combustible substance," said Dr Gajiwala.
A small spark, which need not be an obvious one, anywhere nearby, can trigger the fire, said the doctor.
"Let us say if the child is covered with a silk cloth which can generate static electricity, the combustible gas and the electricity can cause fire," he said.
"The boy should not be near inflammable substances. It's better if he is kept in a cold place," said Dr Babu.
