Knee Pain- Don't Ignore the Sign & Symptoms Knee pain is a common complaint that affects people of all ages. Knee pain may be the result of an injury, such as a ruptured ligament or torn cartilage. Medical conditions including arthritis, gout and infections also can cause knee pain. Symptoms 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: 1.Swelling and stiffness 2.Redness and warmth to the touch 3.Weakness or instability 4.Popping or crunching noises 5.Inability to fully straighten the knee Call Our Physiotherapist if you: 1-Can't bear weight on your knee 2-Have marked knee swelling 3-if you are not able to fully extend(straight) or flex (Bending) your knee 4-See an obvious deformity in your leg or knee 5-Have a fever, in addition to redness, pain and swelling in your knee 6-Feel as if your knee is unstable or your knee "gives out". Physical ther...