Slow blood flow can result in blood clots, which put individuals at risk for life-threatening conditions such as pulmonary embolisms, heart attacks, and stroke. Deep vein thrombosis, blood clots in the legs that can move to other parts of the body, may also develop. Symptoms of deep vein thrombosis and pulmonary embolism include swelling, tenderness, pain, and redness in one leg, breathlessness, dizziness, coughing up blood, upper back or chest pain, and fainting.

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