Whether or not a blood clot in the body eliminates on its own has to do with the size of the clot and whether or not it is a newborn clot. If the thrombus is small and formed over a short period of time, it is possible that it will eliminate itself. Otherwise, they are difficult to disappear and need to be removed by medication, intervention or surgery. When the thrombus is small and formed for a short period of time, it is possible that it will be dissolved and absorbed by the body. Thrombus is the endothelial damage of blood vessels, blood viscosity caused by platelet aggregation, the gradual formation of thrombus, thrombus is smaller, the body’s fibrinolytic system, which can make the thrombus gradually dissolve and be absorbed by the body, there is a possibility of their own elimination. If the thrombus is large or old, the body can not be eliminated by itself, thrombus formation, can cause blood vessel stenosis or occlusion, coronary heart disease, cerebral infarction and other diseases; if the thrombus is dislodged, there is the possibility of causing cerebral thrombosis, pulmonary embolism and other diseases. When thrombosis occurs, treatment options can be selected according to the specific situation. For example, thrombolytic therapy with drugs such as alteplase, or anticoagulant therapy with low molecular heparin calcium, and antiplatelet therapy with aspirin. If necessary, interventional thrombolysis or surgical thrombolysis and other treatment methods. Specific medication needs to be under the guidance of a doctor.