Clicking on its own usually isn't the problem. It's clicking plus an ache around the front of your knee, especially at the bottom of a squat or on the way back up, that's actually worth paying attention to. Here's what's likely going on. What's causing it This combination, front-of-knee ache with clicking or grinding on loaded knee bend, is the classic presentation of patellofemoral joint pain, sometimes called "runner's knee" even though it's just as common in lifters. It ha