Blood Thinners and Swollen Legs

I have a massage client who is taking Coumadin due to a DVT a few years ago.  The DVT was caused by her sitting on her duff too much without enough movement.  Rather than prescribe regular exercise, they prescribed a blood thinner, even though there was nothing wrong with her blood.  Personally, I don't understand this line of thinking, but oh well.  Of course she's now prohibited from eating a lot of the vegetables that might otherwise help with her bowel problems, due to the drug's conflicts with Vitamin K.

She has really bad swelling in her legs, from the knees down, including her ankles and feet.  Since her Coumadin dosage was doubled due to low INR levels about 6 months ago, the swelling has gotten worse.  I understand that correlation is not causation, but is this common?

Also, do they ever decrease one's dosage of blood thinners, or is it always the other way around.  Seems like maybe people's bodies are trying to return to homeostasis, despite the blood thinners, so they keep having to increase the dosage.

Blessed be,
:) Michael
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