Delayed union is a medical term used to describe a situation where a broken bone takes longer than expected to heal. Normally, fractures heal within a few weeks to months, but in cases of delayed union, the healing process slows down, which can lead to complications. Factors contributing to delayed union include poor blood supply, infection, or inadequate immobilization of the fracture. Treatment for delayed union often involves addressing the underlying causes. This may include surgical intervention, such as the use of bone grafts or internal fixation devices, to promote healing. In some cases, physical therapy may also be recommended to improve mobility and strengthen the surrounding muscles.