Deep vein thrombosis may not cause any symptoms. If signs and symptoms do occur, they commonly affect your legs, including swelling of your ankles and feet. Other signs and symptoms may include pain, significant swelling, redness, warmth. A clot closer to the surface of your skin this is referred to as superficial venous thrombosis, phlebitis or thrombophlebitis.
A clot that travels to your lungs known as a pulmonary embolism, this occurs when a deep vein clot breaks free and travels through the right side of your heart to your lung, where it blocks blood flow. This can be a life-threatening situation.