Blood clots in the legs are caused by problems with the blood clotting mechanism, or other underlying diseases, or prolonged bed rest. If an embolus is dislodged, and the embolus flows into the lungs with the blood to cause a pulmonary embolism, it will be life-threatening, and the chances of a successful resuscitation are very low. Embolus dislodgement with blood into the brain will form cerebral thrombosis, depending on the area blocked by the thrombus, it can cause different areas of the body’s activities are impaired, causing more serious sequelae. Arterial thrombosis can cause severe pain in the lower limbs, long-term blockage, ischemia of the lower limbs to further form gangrene, there will be a risk of disability. The emergence of blood clots active treatment is more beneficial than harmful, you need to take anticoagulants and fixed plaque medication, and try to go to the hospital to choose surgery, you can choose to put a filter to prevent the embolism dislodgement and movement, or direct surgical removal of the embolism.