It usually takes about 2 months for the fracture line to go from blurred to disappeared, but it varies somewhat depending on the site and the extent of the fracture. The blurring of the fracture line suggests that there is a significant local growth of bone scabs and that the fracture segment has mostly joined. If there is no bone defect, malnutrition or anemia in the fracture segment, the local bone scab will be gradually reshaped along the direction of bone stress by appropriate weight-bearing stimulation, and finally the fracture line will disappear when the fracture segment is completely connected. However, if there are local factors affecting fracture healing such as bone defects, malnutrition and anemia, the fracture will heal more slowly, taking 3-4 months or even longer to disappear completely. A blurred fracture line indicates that the fracture is in a good healing process, but not yet completely healed. At this time, partial force or incomplete weight-bearing stimulation is possible, but complete weight-bearing or force should not be used to avoid fracture deformation affecting healing, etc.