For the sequelae of fractures of the 2, 3 and 4 metatarsals of the foot, there are two main types: 1. delayed healing or non-healing of the fracture, which is mainly caused by unreliable fixation or premature weight-bearing of the patient resulting in non-healing of the fracture and the appearance of a pseudarthrosis, resulting in pain when walking. 2. deformed healing of the fracture that has not reached anatomical repositioning, resulting in the downward displacement of the metatarsal head and the appearance of the corpus callosum on the bottom of the foot, resulting in pain when walking. This can cause pain when walking. For the prevention of metatarsal fracture sequelae, it mainly includes the following two points: 1. For metatarsal fracture without displacement, it needs to be fixed with a plaster rest for 5-6 weeks, and the X-ray film should be reviewed regularly until the fracture line is blurred before removing the external fixation and gradually bearing weight. 2. If the metatarsal fracture is significantly displaced, it needs to be treated surgically, and the methods of surgical treatment include fixation with kerf pins and plates for internal fixation.