It is normal for a bilateral comminuted fracture of the heel bone to be unable to walk on the ground for 80 days, as it takes about 3 to 6 months to achieve clinical healing. 1. Because the heel bone is the main bone that contacts the ground and bears the weight when standing, a bilateral comminuted fracture of the heel bone will seriously affect the ability to walk. At about 80 days of treatment, it is still in the period of primitive bone scab formation (about 3~6 months), and the scab has not yet reached the ability to resist muscle rotation force, and weight bearing. Therefore, it is normal to walk on the ground and not be able to walk at the moment. 2. At around 3~6 months, you need to go to the hospital for X-ray review. If the fracture has healed well, then you can start to stand up gradually and walk with the assistance of your family. If the fracture is not healing well, the fracture will need to continue to be immobilized and maintained for 9 to 12 months. If the fracture has not healed beyond 12 months, a second surgery may be performed.