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

i had one surgically removed years ago and it hurst worse now than it EVER did when i had it.. Whatever you do dont let them cut you up.

The body expells at its weakest points and odds are you have more than this cyst but it is the only one that is bothering you. If you scope/cut it in any manner you have only created scar tissue that will haunt you like a bad dream.

Naturally you will not like my suggestions, they will all boil around why your knee is a weak spot and what you might have to do to fix it. I had a knee blow out for 4 years, the first 3 months I walked like Frankensteine, been there done that thing and not a fun thing at all. My knees are fine now many years later. My MD at the time stated that if he operated that My may loose the knee function and he suggested I let nature take her course. It was a work injury and maybe just a lazy MD, but either way he had great advice and when I cleaned my diet up, so did the knee clean up.

Your knee will be OK, when you put it first in your life.

For now, just do 3 sitz bath a day and eat fruits only and you can run a few more races. I have a little super cayenne that 1 drop will make that knee burn all day and as the body takes away the cayenne, so will go the fluid. Not a cure, but a start.

MH

This will definately go away if you start a raw diet. All it is, is the body getting rid of waste that it desperately wants to get rid of and this is how it is doing it. Some people have the same thing in other forms, tumors, acne, etc. Like, MH says, it's a form of constipation. Get your bowels moving, adapt to a raw fruit diet and the body will take care of it's self. Personally, I think you could see results in a month or so. If you do eat anything cooked, go for the lowest protein items as possible. That is what causes congestion in the body, cooked proteins. NO meat, processed dairy (even raw dairy is sometimes congesting, particuarly milk and cheese), grains (rice is ok in very small amounts when you want to cheat) If you MUST have something cooked, just eat some steamed veggies with a litte seasoning. Avoid refined oils. I would try to stay completely raw until you were satisfied with your results. As for the exercise, in excess it is acid to the body and ages us, but a small amount is good. It keeps the lymph flowing which keeps our body clean. Also when you are raw you can get away with much less exercise and when you do exercise, your endurance is even better than when you were a conditioned cooked athlete. Good luck!!