The formation of bone scabs is the process of fracture healing, which takes three periods: 1) the hematoma formation period, which takes about 2-4 weeks; 2) the primary bone scab formation period, which takes about 2-3 months; 3) the bone scab shaping and transformation period, which takes longer, about 3-6 months; the earliest X-ray examination can capture the bone scabs, which takes about 2 months. The fracture and the healing speed are different for each part of the body. The richer the blood flow at the fracture and the closer to the heart, the faster the recovery time and the earlier the formation of the bone scab can be seen. The time of scab formation is not certain for each part of the body, and the nutritional status of each person is different, so the time for each person is not certain.