The distal tibiofibular fracture 7 months ankle is still swollen consider fracture non-union or delayed healing, cartilage and tendon injury, lower limb vascular obstruction. 1. Fracture non-union or delayed fracture healing: Fracture non-union or delayed healing, distal tibiofibular fracture 7 months, the fracture ends are not well aligned, poor nutrition, poor local blood circulation, fracture non-union, delayed fracture healing can occur. Both cases will cause poor local blood circulation and swelling of the ankle. 2. Cartilage and tendon injury: distal tibiofibular fracture can be accompanied by ankle cartilage injury and tendon injury, 7 months later, the cartilage injury and tendon injury may not be completely healed, resulting in ankle swelling and pain. 3. Lower limb blood vessel obstruction: long-term immobilization after fracture can easily cause blood stasis in the veins of lower limbs, forming thrombus, causing lower limb blood vessel obstruction, blood circulation obstruction and ankle swelling. Swelling of ankle after tibiofibular fracture is recommended to actively seek medical advice and treatment under the guidance of physician.