Generally, a fracture is considered old after three weeks. Three weeks after the fracture, the hematoma is basically absorbed and local scab formation can occur. If the fracture occurs before three weeks, it is necessary to go to the hospital for a timely examination to clarify the specific fracture, so that conservative treatment or surgery can be performed. If the fracture is considered old after three weeks, the treatment may not be as effective as it should be, so the old fracture needs to be treated with surgery. In general, a fracture is considered old after three weeks.