Egypt's second faith is Coptic Christianity. Copts are heirs of an ancient Christian rite. Coptic Christianity was the predominant religion in Egypt until the 10th century when a lot of Christians diverted to Islam. Christianity itself was brought in Egypt by St. Mark in the middle of the first century AD.
Other possible causes of swelling behind the knee include abscesses (infections); tumors of the skin, soft tissue, or bones; bleeding; deep venous thrombosis (blood clot in the deep veins of the legs); or deformity of the joint after a fracture of any of the bones of your knee joint.
Swollen knee is the accumulation of fluid in and around the knee joint after an injury or in some cases due to an ongoing knee problem. Swollen knee can be caused by: 1  An Accumulation of the Synovial Fluid: This is also called water on the knee or a knee joint effusion. 2  The accumulation of the synovial fluid can come gradually and then go. 3  Arthritis is susceptible of this kind of symptom. 4  Bleeding in The Joints: This is also called hemarthrosis.