22 Dec '14, 7pm

Q: Why do my knee and leg get swollen after a long run? A:

Your swelling seems to be more extensive than the knee and extends both above and below the joint, making me think that the venous outflow from your leg may be restricted to a point where you develop swelling in your whole leg, possibly in the groin area. When you push your mileage up, the resulting “backpressure” causes your entire leg to swell. This could be caused by something pressing on your large veins in the upper leg or pelvis, like a tumor, or a vein that is small naturally and unable to handle high flow of prolonged exercise. I have had one patient in my career with an absent left iliac vein who developed swelling with a very exhausting effort. An ultrasound before and after a long run may give you an answer as it can look at blood flow and detect any tissue mass that might be obstructing blood flow. You might need an MRI also to define the anatomic structures or...

Full article: http://www.runnersworld.com/injury-treatment/causes-for-s...

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