The right forearm, right wrist and right calf were injured in a fall while riding a bicycle. After the injury, the right forearm had localized wound bleeding, swelling and pain, and limited movement, and the right upper middle forearm had localized swelling, pressure pain, and limited movement, with palpable abnormal movement and bone rubbing sensation. Under emergency brachial plexus anesthesia, the dislocation of the small head of the right radius was repositioned, the open comminuted fracture of the proximal end of the right ulna was cleared for fracture repositioning and internal fixation, and the fracture of the distal end of the right radius was treated with incision and internal fixation. Ji Shuqing, Department of Orthopedics, Tianjin Jixian People’s Hospital