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Signs and symptoms of knee effusion include: 1  Puffiness and swelling in the knee. 2  Pain when bearing weight. 3  Stiffness or reduced range of motion due to increased fluid.  One knee appears noticeably larger than the 1  other. May feel warm to the touch.
The typical symptoms of a posterior cruciate ligament injury are: Pain with swelling that occurs steadily and quickly after the injury; Swelling that makes the knee stiff and may cause a limp; Difficulty walking; The knee feels unstable, like it may give out