Dizziness with dry mouth is caused by a disease that triggers an attack of dizziness, while dry mouth is only an autonomic accompaniment of dizziness. Dizziness or vertigo is a motor or positional illusion that causes a distorted response in the cerebral cortex in relation to the space of the person’s surroundings, producing the sensation of rotation, tilting and heaving. It can be generally divided into peripheral dizziness and central dizziness. The former is caused by lesions of the vestibular receptors and the extracranial segment of the vestibular nerve. The dizziness is heavier but shorter in duration and is often accompanied by nausea, vomiting, dry mouth, and sweating. It is commonly seen in otoliths, vestibular neuronitis, and Meniere’s disease. Central dizziness is caused by lesions of the cerebellum, cerebral cortex or intracranial segment of the vestibular nerve, or vestibular nucleus. The dizziness is relatively mild, but lasts longer and is usually not accompanied by nausea, vomiting, or dry mouth.