Knee pain can range from a niggling ache to sharp pain that restricts your movement and ability to walk. You may also notice some swelling, redness or heat in the area surrounding the joint.
In some cases, the knee may make a popping or grinding sound with movement, you may not be able to fully straighten your leg, and your knee may give way or feel unstable when standing up or walking.
It’s important to see a specialist if your pain is very severe, is not improving, has lasted more than a couple of weeks, has significant swelling or deformity, and/or if you’re unable to weight bear or fully extend or bend your knee.