My ankles and knees make a loud, popping/grinding sound when I bend them. My left ankle pops and makes a grinding sound when I move it around. Both of these are very painful. Sometimes when I\\\\\\\'m walking my knees will pop and I have to stop because it is so painful. I have sprained my left ankle before and was told to use crutches for a week. I didnt. Idk if that has anything to do with it but this has been going on for a while now. I play sports and I don\\\\\\\'t want this to hinder me in any way. I\\\\\\\'m also only 13 so idk what to do. Please give me some advice as to why this is happening and how I can prevent it. Thank you!