The characteristics of pain after a fracture are as follows: First, dull pain. After a fracture, due to edema, bleeding and increased local tissue pressure at the fracture end, it leads to compression of local pressure receptors and nociceptive cells, resulting in dull pain, which is not sharp, but may increase with the degree of swelling and may lead to pulsating pain. Second, if the fracture end is more acute and unstable, it may manifest as sharp pain at the fracture site because the fracture end pierces or interferes with the surrounding soft tissues and nerves, which can lead to sharp pain. If the fracture break end irritates the larger surrounding nerves, it may produce radiating pain, such as stimulation of the radial nerve after a humeral stem fracture, which can produce symptoms of irritation of the radial nerve at a distance, producing a sensation of discharge.