It's very cold, and my ankle hurts.

The main reason is related to your trauma, which will lead to a decline in blood circulation.

Moreover, the ankle is at the far end of the body and is sensitive to changes in blood circulation, so it will feel cold. In order to solve this problem fundamentally, it is suggested that some aerobic exercise with long time and low load must be carried out, which is very beneficial to improve blood circulation. Of course, we should also pay attention to keep warm. Just eat more lean meat and soy products.

This should help you.