At present, there is no consensus on the specific causes of cerebral infarction. It is mostly seen in patients with underlying diseases such as hypertension, diabetes, and hyperlipidemia, where there has not been adequate control of the patient's blood pressure, blood sugar, and cholesterol. This can lead to significant increases in blood pressure, blood sugar, and cholesterol. Over time, this might result in the formation of atherosclerotic plaques in the patient’s blood vessels. When these plaques break off and enter the bloodstream, they travel with the blood flow and can lodge in the narrow vessels of the brain. This causes blockage of the blood vessel and leads to ischemia, necrosis, softening, and degeneration of the brain tissue in the affected blood supply area, ultimately causing a cerebral infarction.