For sudden aphasia, which is a symptom of neurological deficit, the presence of cerebrovascular disease is considered first, mostly in middle-aged and elderly patients. Patients can have risk factors for cerebral atherosclerosis such as hypertension and diabetes mellitus, and it is recommended that patients immediately undergo CT and MRI of the head to determine the etiology. In ischemic cerebrovascular disease, which mainly affects the motor speech area, patients can develop aphasia and in severe cases can have unfavorable movement of the lateral limbs. In patients with hemorrhage, adverse limb movements can also occur. In the acute phase of ischemic cerebrovascular disease, patients can be given anti-platelet aggregation therapy. In hemorrhagic disease, conservative or surgical treatment is given depending on the amount of bleeding. For sudden aphasia, it can also be clinically due to localized pharyngeal problems, such as edema of the larynx or inflammation of the pharynx, resulting in aphasia, in which the patient can usually produce speech but cannot hear the voice, requiring consultation with an otolaryngologist if necessary.