<s>[INST] Just recently I have experienced numbness in the front of my left knee. It will come and go almost instantly (2-3 minutes). I thought it might be cold weather but after feeling my knee-cap, it was warm. It felt as if it was cold; like I was cycling in cold weather. My knee does not hurt. I do a lot of walking/hiking/cycling. [/INST] Hello, It could be peripheral neuropathy.Consult a neurologist and get evaluated. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Shinas Hussain, General & Family Physician </s>