Sounds liek the start of Arthritis. I was diagnosed with Heriditary Arthritisof the kneesat the age of 16. The cold really bothers my knees especially when im on stand for hours. Here's what I do. I simply take a couple of them hand warmers, the large kind, and tape them to the knees of my longjohns. Keeps my knees warm and then they dont get so sore. Try it and see what happens for you.