Why does my skin on my legs have burning sensation and pain

[Boobest]

It only happens on my knees and thighs anything that rubs it hurts and it comes with a dull pain which is constant it doesn't happen often just about 6 times a month just not sure what it is and sometimes it happens on both legs at the same time but it doesn't do it anywhere else.

[purple1234567]

This sounds like it could be some kind of nerve issue- to be sure, get to your doctor and explain what is happening.  They will need a bit more information on your medical history but will be able to give you a much better idea on what the cause could be and how to address it.