Age-50 Height-5 5 Weight-50 Six months back one Wound happened in the left leg heal,Doctor made small operation to remove white blood .After 3 hrs of operation the whole leg was paining with swelling above Knee and with some knee joint pain.After that we consulted doctor ,they said that some water is there above knee .They gave medicines but i could not get any releif.Still i am getting pain with swelling above knee and also in knee joint.Situation is worsening day by day,please suggest me.