Dizziness: causes, types, assessment and management

Major clinical subtypes

Clinically, dizziness is often divided into recognizable categories. Common subtypes include:

• Vertigo — the illusion of movement or spinning, usually reflecting vestibular (inner ear or brainstem) dysfunction.
• Presyncope — a sensation of impending fainting caused by transient low blood flow to the brain.
• Disequilibrium — imbalance or difficulty with gait, often due to sensory loss, cerebellar disease, or musculoskeletal problems.
• Nonspecific dizziness — vague lightheadedness or fogginess that does not fit other categories and may be linked to anxiety, medication effects, or systemic illness.

Causes and contributing factors

Vestibular disorders (such as benign paroxysmal positional vertigo, vestibular neuritis, and Menière's disease) are frequent causes of vertigo. Cardiovascular causes include arrhythmias, orthostatic hypotension, and hypovolemia. Neurological conditions (migrainous vertigo, stroke, multiple sclerosis), medication side effects, metabolic disturbances (low blood sugar, dehydration), and psychiatric conditions can also produce dizziness. Age-related changes in balance and vision increase the risk of chronic disequilibrium in older adults.

Assessment and diagnosis

Evaluation begins with a careful history to categorize the sensation, its onset, duration, triggers and associated symptoms (hearing loss, tinnitus, weakness, chest pain). A focused physical examination assesses blood pressure and pulse, neurologic function, gait and vestibular tests. Additional testing may include audiometry, bedside maneuvers for positional vertigo, electrocardiography, orthostatic vitals, blood tests, imaging (MRI or CT) and specialized vestibular testing when indicated. See more resources on vestibular evaluation at vestibular assessment.

Treatment and prognosis

Treatment depends on the cause: repositioning maneuvers (e.g., Epley) for positional vertigo, vestibular rehabilitation exercises for balance retraining, medications for acute symptoms, and addressing cardiovascular or metabolic contributors. Some causes resolve spontaneously while others require long-term management. Early targeted therapy often improves symptoms and reduces the risk of falls, especially in older people.

When to seek urgent care

Immediate medical attention is warranted for sudden severe dizziness with focal neurologic signs (weakness, slurred speech, visual disturbance), chest pain, shortness of breath, or loss of consciousness. These may signal stroke, cardiac events, or other life-threatening conditions. For recurrent or persistent dizziness, a primary care or specialist evaluation helps identify treatable causes and prevent complications.