I have an odd discoloration in my left foot. My foot is not in any pain but whenever I am not moving around the side of my foot and my toes turn a red/purplish color. This past summer I did some hiking and got a nasty blister on my heel because of improper shoes. I am unsure what issue may be causing the discoloration so any advice would help.
It sounds like you may have a vascular problem called Raynaud's Disease, which causes the arteries to vasoconstrict (narrow) and diminish blood flow. That may explain why the problem only happens when you are not moving around. When you move, the muscles contract and demand an increase of blood flow.
You will need to have this confirmed with your physician. He/she can do a cold stimulation test to see if the discoloration worsens. Also, blood tests need to be taken to rule out other underlying problems that may contribute to this, such as Scleroderma or Lupus Disease. Smoking can also affect arterial blood flow (so stop if you are to prevent further vascular compromise).
I don't believe that the old hiking blister has any correlation to this problem.
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