Small ischemic foci are usually commonly described in cranial CT and MRI examinations, suggesting that there may be capillary blockage in the brain, causing localized brain tissue ischemia or necrosis with a small area of damage, usually due to atherosclerosis. Small ischemic foci are easily seen in patients with vascular sclerosis, diabetes mellitus, hyperlipidemia, hypertension, and other diseases. Some patients may not have overly obvious symptoms at the onset, but some patients may experience headache, dizziness, tinnitus and numbness of the limbs, etc. At this time, aspirin enteric tablets, statins and blood-stasis-boosting drugs can be given under medical supervision to prevent the development of severe cerebral infarction. When the lesion is relatively small, the impact produced is also relatively small, and the signs and symptoms present in the patient may not be too obvious. However, the appearance of small ischemic foci is already an alarm for the body’s health, informing patients that the tiny blood vessels in the brain may have been damaged, ischemic or necrotic, and they should pay attention to the regulation of their life and diet, such as low salt and low fat diet, quit smoking and alcohol, pay attention to rest and avoid straining. Patients with hypertension and hyperglycemia need to control their blood pressure and blood sugar at normal levels.