If you have tried the measures mentioned and the swelling persists, it is advisable to apply ice wrapped in a damp towel for 10 to 15 minutes at a time as often as possible during the day and to keep the leg elevated whenever possible. An ankle sprain can cause the symptoms you described, with swelling increasing during the day while you are standing. You should notice gradual improvement every day. If the situation persists for more than 2 weeks without improvement, it is recommended to consult a physiotherapist, as they are best suited to evaluate and treat these types of issues and develop a treatment plan to address the problem and prevent it in the future. Most group insurance plans cover this service.