Symptoms of deep vein thrombosis in the legs include pain, swelling of the affected limb and discoloration, according to the Indiana Hemophilia & Thrombosis Center. The area nearest to the blood clot may feel warm, and the discoloration may appear bluish or suffused.
Pain commonly starts in the calf and may feel like cramping or soreness, notes Mayo Clinic. Deep vein thrombosis can occur without any noticeable symptoms. Patients may develop a more serious side effect of deep vein thrombosis known as a pulmonary embolism. Signs of a pulmonary embolism include sudden shortness of breath, chest pain that worsens with a deep breath, lightheadedness, dizziness and a rapid pulse.
Pain in the leg could occur only while walking or standing, says WebMD. Skin may turn red in the affected leg, veins may become visible on the surface of the skin and legs may fatigue quickly. When the blood clot leaves the legs and travels to other parts of the body, it becomes a pulmonary embolism. Half of all deep vein thrombosis cases have no symptoms, and patients should call a doctor immediately if any symptoms develop suddenly.
Thrombosis refers to a blood clot forming in a vein or artery, explains MedicineNet. The actual clot is called a thrombus. When the clot travels to other parts of the body, it is called a thromboembolism.