Recently my knee began aching like it usually does with cold weather and then it started to swell a little and I feel this heavy pressure in my knee whenever I walk or try to bend my leg, it doesn't hurt but almost feels numb and I can feel popping when I bend it. I haven't injured it and I am only 24, what could this possibly be and what do you recommend?

Try Hylaronic acid you can buy it at Wal Mart in the vitamin aisle for around $5.95 for about a months worth. I take it everyday.

This website explains a lot about HA
Hyaluronic Acid Patent (http://www.calcompnutrition.com/hyaluronic_acid_patent.html)