The location and severity of knee pain may vary, depending on the cause of the problem. Signs and symptoms that sometimes accompany knee pain include:  Swelling and stiffness Redness and warmth to the touch Weakness or instability Popping or crunching noises Inability to fully straighten the knee 
location severity knee pain may vary  depending cause problem  signs symptoms accompany knee pain include:  swelling stiffness redness warmth touch weakness instability popping crunching noises inability fully straighten knee 
knee pain