To send a link and summary of this article to a friend, click here . Your pain makes it hard for you to walk. The knee feels loose or unable to support your weight. You also have severe swelling, redness or discoloration that doesn't diminish after 24 hours.
Unexplained pain lasts for more than three days.
Pain following an injury doesn't diminish within five days. As one of about 50 million Americans with knee problems, you' ve just joined the Painful Knee Club. Our knees have always been vulnerable to an assortment of bumps, bangs and bruises. But as we have become an older and more active society, our hapless knees now bear more burdens and face more wear and tear than ever before. Hence the club's ever increasing membership.