Should I get my knees drained?

I'm a wrestler; it's pretty common for a wrestler to get his knees drained. I've been having knee pain on both knees for quite some time now, when I walk up and down stairs, when I play sports, jog, etc. I'm not sure if I have fluid in my knee or not, but it seems like it. Should I go to the doctor, check it out and get it drained?