8 doctors weighed in:
Edema legs feet ankles black/ blue sudden onset?
8 doctors weighed in

Dr. Howard Fox
Podiatry
7 doctors agree
In brief: Fluid retention
Usually comes from one of 4 areas: heart, lungs, liver or kidney.
The fluid shows up in the feet due to gravity. The black & blue discoloration may or may not be related to the swelling. Sometimes, the swelling can actually break a few tiny blood vessels to cause the black & blue, but it could be unrelated also. You need to see your doctor asap. Sudden onset of swelling can be serious.

In brief: Fluid retention
Usually comes from one of 4 areas: heart, lungs, liver or kidney.
The fluid shows up in the feet due to gravity. The black & blue discoloration may or may not be related to the swelling. Sometimes, the swelling can actually break a few tiny blood vessels to cause the black & blue, but it could be unrelated also. You need to see your doctor asap. Sudden onset of swelling can be serious.
Dr. Howard Fox
Dr. Howard Fox
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1 comment
Dr. Ed Friedlander
Something obstructing or compressing the inferior vena cava can do this and gets overlooked for too long too often. Physician office visit as soon as possible; imaging studies are very likely to be helpful.
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