The youngster had refused to return the ball quickly with time running out in the Blues' Capital One Cup semifinal at Swansea, prompting an angry reaction from the Belgian
The youngster had refused to return the ball to play quickly as it went behind the goal, and ended up laid on top of the ball as the Belgian came to confront him. With the ball trapped under his body, Hazard attempted to kick the ball out from underneath him, but also caught the child in the ribs.
After much deliberation, referee Chris Foy brandished the red card, and Hazard will face at least a three-match ban.
Chelsea's official Twitter account reacted incredulously to the decision, saying: "Has football gone mad? Hazard is sent off for kicking the ball under a ball boy attempting to smother the ball rather than return it."
Swans skipper Ashley Williams also commented on the incident after the game, blasting the Belgian's actions.
"Demba Ba told me that the boy held onto it but I saw him kick him in the ribs and you can't do that," he told Sky Sports.