Burners and stingers are common injuries in contact sports.   A burner or a stinger is an injury to the brachial plexus, the nerve supply of the upper arm, either at the neck or shoulder.  This often happens when the head is forcefully pushed sideways and down, or twisted.  This bends the neck and compresses, or pinches, the surrounding nerves.  The injury is named for the stinging or burning pain that spreads from the base of the skull, to the shoulder or along the neck and to the hand.  This can feel like an electric shock or lightning bolt down the arm.