The possible reasons for the bone to become bigger after breaking the foot include soft tissue injury around the bone, ligament injury, fracture and so on.
1. Soft tissue injury: the soft tissue around the ankle may be damaged after breaking the foot, capillary expansion around the soft tissue, so that the soft tissue around the congestion, edema, it looks and feels like the bone becomes bigger.
2. Ligament injury: the ligaments around the ankle joint may be damaged after breaking the foot, which makes the ankle joint unstable, and the displacement of the ankle joint becomes bigger when moving, and the ankle joint turns out, resulting in the symptom of the bone becoming bigger.
3. Fracture: The ankle may be fractured after breaking the foot, and the fracture end is displaced. The local bleeding and swelling of the fracture leads to the enlargement of the bone.
There may also be other reasons such as bone tumors, which can be treated with cold compresses within 72 hours after breaking the ankle, and then go to the hospital in time.