Pain in area outside of the knee: what doctor to see?

Dear Ask The Doctor: When I have an issue, I normally google to get more information and arm myself with some ideas and opinions about potential treatment options before visiting my doctor. However something very odd has happened recently (last couple months). On my left leg only, I have a pain on the outside side of my leg, below my knee, when I kneel on that knee. It originally happened when I kneeled on a bed to get something on the other side, and it was a twinge, and not a bad pain. Then, recently, I kneeled on the floor to get a grape that had rolled under the stove and the pain made me gasp. It's odd to me because of its location - for example, I think, it's not my knee, so not the meniscus. Bone spur occurs to me for some reason. The pain in on the outside, about 1-2 inches below the fold at the back of my knee (but the pain is on the side, closer to the front than the back - quite near my knee, I guess. It's a burning pain, not a muscle thing, not a sharp twinge. I keep looking at that flawless area from the outside - expecting to see something, but nothing. It's inside. I just need to know a) what kind of doctor to visit and b) some clues as to what to think about/research. (I don't exercise regularly enough, and when I do, it's low impact at the gym)

Dear Pamela:

According to the description of your symptoms it would be important to rule out  a Pes anserine bursitis (or pes anserinus bursitis) which is an inflammatory condition of the  conjoined tendon and its bursa that  lies superficial to the tibial insertion of the medial collateral ligament (MCL) of the knee. The pain usually is felt on the anterior part of the knee. The incidence of pes anserine bursitis is higher among obese, middle-aged women. Among older individuals with arthritis, a slightly higher on females over males this fact may result from the broader female pelvis and the greater angulation of women's legs at the knees, placing additional stresses on these structures. Also a patella femoral syndrome can give you those symptoms. I strongly recommend that you get a consultation with a Sports medicine or orthopedic surgery specialist, get evaluated clinically and with imaging procedures to determine the best treatment option for you.