The most common causes of cerebral thrombosis are as follows: First, hypertension, which is a very important risk factor for cerebral thrombosis. Second, diabetes, diabetes is also an independent risk factor for cerebral thrombosis. Diabetic patients can not only cause atherosclerosis of large arteries, but also cause microvascular lesions, which can promote the formation of cerebral thrombosis. Third, previous coronary heart disease, atrial fibrillation or wind heart disease, as well as after heart valve surgery or acute myocardial infarction, can easily form thrombus in the atrium, and after the thrombus is dislodged, it can also easily cause cerebral embolism, which is also an important risk factor for cerebral thrombosis, and obesity and hyperlipidemia are also risk factors for cerebral thrombosis. For young female patients, if they take oral contraceptive drugs for a long time, it can cause the increase of blood viscosity, which is also a risk factor of cerebral thrombosis.