My knees burn when kneeling on them?

Patellar pressure. I agree with dr hadied, but since you feel this when you kneel this suggests pre-patellar bursitis. This is the bursa on top of the kneecap. Sometimes this bursa can swell and even get infected. Burning is a little unusal symptom, usually it is pain. Burning could be due to an effect on the nerves around the knee. Do both knes burn, or just one side.
Possible bursitis. The have in front bursa(could more than) some time get inflamed which could cause that burning, also if you have arthitis behind the knee cap could do that.

Related Questions

Sometimes when I bend my knee far enough or kneel on it, one location on my knee cap feels like it is burning. Is there anything I can do?

Likely bursitis. Sounds like inflammation of the prepatellar bursa (flattened sac that provides protective layer between knee and skin). Usually a result of prolonged kneeling or other "wear-and-tear". Rest (avoid kneeling) and sometimes a knee wrap for protection is helpful. If no contraindications, can use nsaids for inflammation. See a physician for an exam to be sure. Read more...

I'm 62 yrs old and have started having discomfort in my left knee when I kneel that feels like a carpet burn, should I be concerned?

Yes. It is probably the beginning of osteoarthritis. Exercise your knees. Apply warm water bottle around the knee. You can take Motrin over the counter for pain. You can take glucosamine / chondrotin sulfate twice a day. This is non prescription. Please see orthopedic surgeon for cortisone or synvisc (hylan g-f 20) injections if it remains symptomatic. Read more...
Probably not. If you describe the location it would help. Infrapatellar bursitis will frequently complain of pain and swelling in the front knee below the patella that can radiate below the knee often, is causes severe pain with kneeling or walking down stairs. Common symptoms of itbs ileotibial band syndrome (a different problem), are burning pain in the outside part of the knee. Both do well with treatment. Read more...

I have a burning, stinging severe pain on the outside of my left knee when kneeling...even when climbing onto my soft mattress.

Iliotibial band. could be inflammation of distal iliotibial band, could be knee arthritis or meniscal tear. I would start with NSAID treatment, barring no contraindications (ulcer, kidney disease). I would at least obtain an X ray of the knee and trial of physical therapy. You can seek interventional pain medicine, and seek injections. If symptoms dont resolve, then you should get an MRI. best of luck. Read more...

When I kneel on my left knee I get a burning pain on the outside of my knee. No other pain is present and I can run sprint walk with no problems.

Injury OR not. You may have injured your knee by whacking it somewhere without realizing it recently and now the area is stinging every time you put pressure on it...OR...you're simply compressing one or some of the cutaneous nerves around the knee in that position...wear a kneepad..OR there's a structural issue with the knee or cap. www.healthtap.com/drsaghafi Key Code: PDXFNR. Read more...