Dear sir, My father has knee pain. He is 59 years old now. We have taken all the treatments for it. But illness is at last stage & doctor give the solution of knee operation. Because liquid to avoid friction in the knee joint is reduced to low level according to doctor consultation. But my father is not ready for operation because there is some limitations after operation. Please suggest us the proper treatment which increase the level of this liquid secret in the knee joint at this stage. And if you have the solution please reply.