Eric, 52 Taiwanese, came to my clinic with acute pain and swelling in his leftt ankle that has been going on for 3 weeks. He recalled that all symptoms occurred after he played a bit of badminton. However, he did not notice that he sprained his ankle during a game until he felt pain the next morning. The pain and swelling was so intense that he had to go to the emergency room. The ER doctor diagnosed his foot issue as a minor sprain based on x-rays showing no fratures whatsoever. He was sent home with some pain killers and crutches for three weeks.