Having a lacunar cerebral infarction at age 70 is usually not considered very serious. Cavernous cerebral infarction refers to the occlusion of the lumen of small penetrating arteries deep in the cerebral hemispheres or the brainstem, forming small infarct foci. Due to the small foci, patients with lacunar cerebral infarction may have no obvious clinical symptoms, and those who have symptoms may show mild hemiparesis, dysarthria, ataxia and so on, so the harm is usually not great. The prognosis of lacunar cerebral infarction is good, but it is prone to recurrent attacks and multiple lacunar cerebral infarction. Generally, the symptoms can return to normal after active treatment, but there may be sequelae such as dysphagia, limb mobility, dementia and so on. Therefore, it is recommended to consult a doctor for timely intervention and treatment when suffering from lacunar cerebral infarction at the age of 70.