How long is the swelling from a sprained ankle?

Depends on treatment: This is dependent on your treatment. Good rule of thumb is to rice (rest, ice, compression and elevate) immediately after the injury. Depending on the degree of injury as well as the immobilization following, swelling can subside within a few days of an injury to many months. Have your foot examined by a foot/ankle specialist.

Ankles sprains : Can take many weeks to stop swelling. Rice will help rest, ice, compression and elevation. It depends on what grade of sprain it is and what treatment is rendered.

Ankle sprain: To heal a sprained ankle, it depends on the severity of the sprain. If its a chronically sprained ankle with constant pain and instability, it will take longer than a mild outside sprain. Usually 3-4 weeks of rest, icing, antiinflammatory meds (like advil (ibuprofen) or motrin), bracing or compressing wraps, with or without physical therapy should the starting treatment. Hope that helped!