The frequent pain in the leg that has been fractured may be caused by the following reasons: i. It is possible that the fracture is near the joint, such as the knee or ankle joint, and the fracture near these two places may damage the joint surface, leading to the appearance of late traumatic arthritis, which may result in frequent pain in the leg or joint, and in severe cases, local swelling or increased skin temperature, etc. Redness, swelling, heat and pain. You can take oral non-steroidal anti-inflammatory drugs to relieve pain and inflammation, or you can apply glucosamine tablets to nourish joint cartilage. Second, it may be a sterile inflammation of soft tissue after fracture, you can do local massage or physiotherapy, the symptoms will be slowly relieved.