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2. Swelling in One Limb
A common sign of DVT is swelling in an leg or arm. “Blood clots can block the healthy flow of blood in the legs, and blood can pool behind the clot causing swelling,” explains Dr. Navarro. According to the Centers for Disease Control and Prevention (CDC), symptoms of a blood clot in the leg include swelling, redness, and tenderness.2 If you notice sudden swelling, especially with pain, it’s important to consult a doctor.