Commonly, swollen feet are caused by foot sprains or trauma. Foot sprain if not timely treatment will soon appear foot swelling, the key measure is to sprain immediately after the cold compress with ice, no ice with cool water or tap water for 10-15 minutes can also be rinsed, can make vasoconstriction, reduce the formation of hematoma, play a role in reducing swelling and pain. After 24 hours, then apply hot compresses to improve blood circulation and promote the swelling to subside. At the same time, the affected limb can be elevated when sleeping at night, which can also play a role. If the pain is really unbearable, you can also take pain medication and topical medication for treatment, commonly used pain medication is mainly non-steroidal anti-inflammatory drugs, commonly used celecoxib, meloxicam, etc., and topical medication is Fotonin.