If you've undergone ACL reconstruction and still can't fully extend your knee weeks after surgery — despite doing the physical therapy, following the protocol, and doing everything right — you may be dealing with a cyclops lesion.

If you have been dealing with anterior interval scarring — whether following ACL reconstruction, a tibial plateau fracture repair, or another knee procedure — you already know that the frustration is not just physical.

Living with a knee that will not fully straighten changes more than your range of motion. It reshapes how you walk, how you sleep, how you climb stairs, and eventually how you think about your own body.

If your knee has gradually locked up — less bend, less extension, a deep ache that doesn't match what the imaging shows — you've probably already been told to "just do physical therapy" or "give it time." That advice isn't wrong, but it's incomplete.

If you've been told your knee "just doesn't want to straighten" or that the back of your joint feels permanently tight after surgery, an injury, or a long period of immobilization, you've probably already heard the standard advice: stretch more, do your physical therapy exercises, give it time.