15YearsOld Bad knee injury

[AndyOH]

Hi, I'm 15 years old. A little early in my opinion to think about arthritus. Heres my story I was on my bike 2 years ago, making a jump out of crates with my friends in an alley, long story short I'm sliding 10-15feet on my knees. I call my dad my friend takes his shirt and wraps my bloody knees in it. When I got home I immeadiatly disinfected it . That night I had a wet layer of liquid on the top. I disinfected it everyday for a week then It started to scab. This lasted maybe a month when the scabbs started healing. Now 2 years later im left with scars and knee pains. I have a dream of being able to do Parkour but I know I wont unless I find out whats wrong. My knees hurt when running for over 5-10 minutes especially in the cold. My knees feel..Loose (is the best way to say it) when sitting. ALso when standing on m knees they hurt really bad. Whats wrong?

[txsilver]

ARWA gave great advice.  You should definitely see a doctor.

[arwa]

I would recommend that you have those knees checked out as soon as possible.
I wonder whether part of your problem is not also growing pains. Please seek medical help for those knees...