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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.
Here are some of the common knee pain symptoms that are experienced by patients, and what these symptoms may mean about the cause of your knee pain. Front of Knee: Pain over the front of the knee is most commonly related to the knee cap. Kneecap pain can be caused by several different problems.