Can poor blood circulation of the legs can cause bruises?

I stopped to take my medicine for it and in like 3 days I've get more than 20 bruises on my calf / knee. Is this normal?
It's quite boring since it's too hot to wear pants. It's ugly.

If not, do you know any reasons why I bruises so much (without hitting myself) ?
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Can poor blood circulation of the legs can cause bruises?
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