by 
The Curious Bag
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Blood clots can be deadly, and recent medical studies show that in some cases an ankle sprain has led to fatal blood clots. Recognizing the symptoms of a blood clot in your ankle--especially if you recently injured the area--could very well save your life.
Expert Insight
The risk of a blood clot in the ankle is three times greater than normal after an injury, according to a study released by the Archives of Internal Medicine in 2008.
Causes
In the absence of injury, prolonged sitting or standing can cause a blood clot in the ankle, according to MedlinePlus. When an ankle is injured, this inhibits movement which causes blood to clot in the affected area.
Swelling
Swelling that won't go away, especially after a sprain, could indicate a blood clot in the ankle, according to CBS 4 Denver news report.
Other Symptoms
Other symptoms which could mean a blood clot in your ankle include pain that increases (or in the case of an injury won't go away), redness in the leg and sudden chest pain.
Treatment
Prompt medical attention is key to treating any blood clot, according to MedlinePlus. In some cases diuretics may be prescribed to reduce swelling and injections given to break up any clots.
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