There is no complete correlation between headache and slurred speech. It is possible that the patient may have a headache first and then have slurred speech. If the headache is associated with hypertension, the patient may have a cerebral infarction or a cerebral hemorrhage, and the slurred speech is central. Typically, patients with partial frontal lobe infarction will have slurred speech and naming aphasia, such as not being able to name things, also called aphasia. In case of poor pronunciation, it is important to consider diseases of the pharynx, which may be caused by damage to the recurrent laryngeal nerve, and symptoms caused by medullary paralysis, so it is important to examine different etiologies. CT is the best way to rule out cerebral hemorrhage, and after that, MRI can be used to examine some very small localized infarcts or embolisms to differentiate them.