What is the reason for my ankle swelling and pain these days?

The specific reasons may be as follows.

1, body position coefficient:

Walking or standing for a long time, improper sitting posture, long legs drooping and sedentary will all lead to poor blood circulation of lower limbs, so reducing the assistance of muscle exercise to venous blood return will cause edema. Improper shoes can also cause edema. This edema will subside after rest. When the weather is hot, edema will get worse.

2. Climate factors:

When the weather is hot, most of the peripheral blood vessels of the human body expand, which makes the capillaries congested, so the skin, subcutaneous tissue and soft tissue swell slightly, which is the reason why heat expands and cold contracts.