Hello. The back of the knee is one of lymph drainage areas used by the body, to rid toxins. You could drain it a million times by force, and it will come back. Why? because there is loss of function. There is an herb and poultice that I know to be good for lymph drainage even after surgury, but the herb is never a cure alone. If you have done the cleanses and fasting that this forum talkes about, then I would have to say that your body is trying to send you a message. Are you willing to listen?
It may be that the running and arobics are not good for you. I have known runners to be the hardest on their bodies and still go out for more and more pain to finish races--all at the expense of the body.
This is just my thinking. I know you love to run. I know it is addictive.
Neesay