This is strange I have a burning on the outside of my knee when the knee is bent and then touched in just the wrong way. I can touch with my finger no problem, but sometimes just the slightest touch causes intense burning.
I found this on Justanswer, and I could have written this, it is exactly what I am feeling.
I have a burning sensation on my right knee. It is under the skin and only hurts when touched. Otherwise, no pain. But sometimes even the top sheet running across it causes some discomfort. If I put a lot of pressure on it, like grazing it when kneeling, it is extreme. It does not hurt when I walk at all. And, just to bend it is not painful, but if something touches it or I rub it across something while I am bending it, it is also extreme. There is no knot or bump or redness or anything on the outside of the skin that would indicate anything is wrong. It does not hurt when I exercise. I can put pressure on the spot that hurts with my fingers, but I don’t get the same reaction. It sounds crazy. Maybe I am, but the sharp, burning pain is real. Thank you! The specific location of the pain is just barely past my kneecap extending down and to the right.