This boy is suffering from myiasis – a maggot infestation of a living body. This is a typical case in Central and South America or in countries where the climate is tropical.
The fly larvae can enter the human body through a wound or opening, such as an ear.
This video is for the educative purpose about aural myiasis and what to do when you get infested by house fly larvae.
The following video may contain the disturbing scene.