Hi. I am 16 years old and my knee has been hurting since i was about 12 years old. Back then it was only hurting when it was touched, then it started just aching whenever i bent it, which started half a year ago. Then just this morning, i was walking around my house, and it just started hurting whenever i put weight on it. I am scared to do physical activity because i think i might injure it. I am 6 foot one inch and still growing, so could it just be my body getting used to my height as i am growing, or is it something serious i should be concerned about. I am very athletic, and do 3 sports, so my knee is very important to me. please write back