Small ischemic foci on MRI are generally not important, but patients should be treated promptly and reviewed regularly to avoid progression of the disease. Small ischemic foci are often seen on cranial MRI and are essentially cavernous cerebral infarcts, or cavernous infarcts, which are usually caused by atherosclerosis and are associated with risk factors such as advanced age, diabetes mellitus, hypertension, hyperlipidemia, and smoking. Cavitary infarction can occur in any part of the brain tissue. If it occurs in non-functional areas, patients may have no obvious clinical signs and symptoms due to the small scope of the lesion; if it occurs in the center of limb movement, it may lead to numbness and impaired movement of one side of the limb; if it occurs in the center of vision, the patient may have symptoms of hemianopsia, blurred vision, etc. Although cavitary infarction does not usually cause very serious problems, it is usually caused by atherosclerosis. Although cavity infarction does not usually cause very serious lesions, it needs to be taken seriously. Cavitary infarcts indicate that atherosclerosis and plaques have occurred, and further angiography is needed to see if other arteries in the body have developed atherosclerosis as well. In addition, there is a possibility that the patient may develop a full-blown stroke, and the patient should strictly manage risk factors such as blood pressure, blood glucose, and blood lipids. If small ischemic foci are present, further examination should be performed under the guidance of a physician and treatment should be prescribed.