Three-year-old children grow and develop very fast, and even if they have fractures, they heal much faster than adults, and most of them heal completely in about a month. After the fracture is completely healed, the child should go to the hospital for a radiograph to check the fracture, and then he can carry out normal activities and functional rehabilitation exercises to gradually return to the normal level. However, there are exceptions for special fractures, such as the fracture of the femoral head, because the growth and development of the femoral head is not very complete, if there is a fracture, it will easily lead to complications of femoral head necrosis, so you should review the fracture at one month. Otherwise, the possibility of complications of femoral head necrosis will be greatly increased and the healing of the fracture will be delayed.