A scaphoid fracture occurs when you break your scaphoid bone. It is the type of fracture that most commonly happens after a fall on to your outstretched hand. That is, when your palm is flat and stretched out and your wrist is bent backwards as you fall to the ground. Instinctively, you will usually put your hands out in this position for protection if you fall forwards.
This is a companion discussion topic for the original article at https://patient.info/bones-joints-muscles/scaphoid-wrist-fracture