I was playing with my dog the other day while making a bed and got on my knee on the sheet and felt a sudden burning sensation while on my knee. I thought I received something similar to a rug burn and didn't think anything of it. This happened 3 weeks ago. Since then, I have had continued pain and numbness on the right side of my knee. No feeling when I touch it but a stinging and burning sensation if I try to get on my knee at any time. Sometimes it burns for no reason when just sitting. I'm confused as to what could cause this.