Swollen ankles after exercise may be caused by local soft tissue injury or bone injury, or may be caused by venous disease of the lower extremities. 1. Local soft tissue injury: if the ankle is swollen with pain after exercise, it may be caused by too much exercise, which makes the local soft tissue injury. 2. Bone injury: if the ankle swelling after exercise is more serious and accompanied by pain, and there is no relief for a long time, it may be that the exercise is too strenuous, resulting in bone injuries, such as bone fracture and bone cracks. 3. Lower extremity venous disease: If the patient himself has lower extremity venous disease, the venous return is slow, it is also possible to have ankle swelling after exercise. Swollen ankles after exercise may also be caused by other reasons, the specific need to go to the regular hospital for relevant examinations, a clear diagnosis, and then targeted treatment, so as not to delay the condition.