Dizziness and Vertigo

Dizziness is one of the most common symptoms encountered in clinical practice, with an estimated 15–30% of adults experiencing it at some point in their lives. The term "dizziness" is broad and imprecise — it can encompass several distinct sensations that have different underlying mechanisms and diagnostic implications. Understanding the type of dizziness is essential for guiding appropriate evaluation and management.

Dizziness vs. Vertigo vs. Presyncope vs. Disequilibrium

Modern medicine typically classifies dizziness into four main categories based on the patient's subjective description:

• Vertigo — the illusion of movement, usually a spinning sensation, either of the self (subjective vertigo) or of the surroundings (objective vertigo). Vertigo strongly suggests a vestibular system disturbance, either peripheral (inner ear) or central (brainstem or cerebellum).
• Presyncope — the feeling of impending loss of consciousness without actually fainting. It is often described as lightheadedness, weakness, or "feeling like you might pass out." Cardiovascular causes (orthostatic hypotension, arrhythmia) are common.
• Disequilibrium — a sense of imbalance, unsteadiness, or difficulty maintaining balance, particularly when standing or walking. It is often worse in the dark or on uneven surfaces. Neurological conditions (peripheral neuropathy, Parkinson disease, cerebellar disorders) are frequent causes.
• Non-specific dizziness — a vague, floating, or disoriented sensation that does not fit neatly into the above categories. It may have multiple contributing factors including anxiety, medication side effects, metabolic disturbances, or multisensory deficits.

Epidemiology

Dizziness accounts for an estimated 3–5% of all emergency department visits and is among the top reasons for consultation in primary care. The prevalence increases with age, with some studies reporting that more than 30% of people over 65 experience dizziness. Despite its frequency, the symptom can be challenging to evaluate because the differential diagnosis is broad and the subjective experience varies widely among individuals.

The causes of dizziness are numerous and span multiple organ systems. Differentiating between peripheral (inner ear) and central (brain) causes is a critical first step in evaluation.

Peripheral Vestibular Causes

Benign Paroxysmal Positional Vertigo (BPPV)

BPPV is the most common cause of peripheral vertigo, accounting for approximately 17–42% of all vertigo cases. It occurs when otoconia (calcium carbonate crystals) dislodge from the utricle and migrate into the semicircular canals, typically the posterior canal. Episodes are brief (usually less than 60 seconds), intense, and triggered by specific head movements such as rolling over in bed, looking up, or bending down. The Epley maneuver and other canalith repositioning procedures are the first-line treatment and are highly effective.

Meniere Disease

Meniere disease is an inner ear disorder caused by endolymphatic hydrops (abnormal accumulation of endolymphatic fluid in the inner ear). It typically presents with a classic tetrad of symptoms: episodic vertigo lasting 20 minutes to 12 hours, fluctuating sensorineural hearing loss (often initially affecting low frequencies), tinnitus (usually low-pitched and roaring), and aural fullness. The condition usually affects one ear initially but may become bilateral over time. The etiology is not fully understood, but theories include impaired endolymphatic sac function, autoimmune mechanisms, and genetic factors.

Vestibular Neuritis

Vestibular neuritis is an acute inflammation of the vestibular nerve, usually attributed to a viral infection (often preceded by or coincident with an upper respiratory infection). It presents with sudden, severe vertigo lasting days to weeks, persistent nausea and vomiting, and significant imbalance. Unlike Meniere disease, hearing is typically preserved. Vestibular neuritis is the second most common cause of peripheral vertigo after BPPV. Treatment involves vestibular suppressants for acute symptoms and vestibular rehabilitation exercises for recovery.

Central Causes

Central causes of vertigo arise from dysfunction of the central nervous system, particularly the brainstem and cerebellum. These are generally more serious than peripheral causes and require urgent evaluation when suspected.

• Vascular events — Posterior circulation stroke (cerebellar or brainstem infarction) and transient ischemic attack (TIA) can present with vertigo. Vertebrobasilar insufficiency is an important consideration, particularly in older adults with vascular risk factors.
• Vestibular migraine — Migraine can cause vertigo with or without headache. It is one of the most common causes of recurrent vertigo, affecting approximately 1–3% of the population. Diagnostic criteria include at least 5 episodes of moderate-to-severe vertigo, migraine history, and exclusion of other causes.
• Multiple sclerosis — Demyelinating plaques in the brainstem or cerebellum can cause vertigo. Dizziness may be one of the presenting symptoms of MS.
• Brain tumors — Cerebellopontine angle tumors (such as acoustic neuroma/vestibular schwannoma) can cause progressive imbalance and vertigo, typically with unilateral hearing loss and tinnitus.

Other Common Causes

• Orthostatic hypotension — A drop in systolic blood pressure of at least 20 mmHg or diastolic blood pressure of at least 10 mmHg within 3 minutes of standing. Common in older adults, diabetic patients, and those on antihypertensive medications.
• Medication side effects — Many medications can cause dizziness, including antihypertensives, sedatives, antidepressants, anticonvulsants, and aminoglycoside antibiotics.
• Anxiety and psychogenic dizziness — Chronic subjective dizziness (also called persistent postural-perceptual dizziness, PPPD) is a functional vestibular disorder often triggered by or associated with anxiety, panic, or stress.
• Metabolic disturbances — Hypoglycemia, anemia, dehydration, and thyroid dysfunction can all contribute to dizziness.

The TCM understanding of dizziness — known as Xuan Yun (眩晕) in Chinese — has a rich history spanning more than two thousand years. The foundational text, the Huang Di Nei Jing (Yellow Emperor's Inner Canon), compiled between approximately 400 BCE and 200 CE, contains important early discussions of dizziness etiology. The Nei Jing associated dizziness with dysfunction of the Liver, with rising Wind, and with deficiency of Qi and Blood failing to nourish the upper body.

Zhang Zhongjing's Jin Gui Yao Lue (Essentials from the Golden Cabinet, circa 180–220 CE) further refined the understanding, describing dizziness arising from Phlegm-Dampness obstructing the clear orifices — a framework that remains central to TCM practice today. His description that "Phlegm and Water cause dizziness" established a diagnostic pathway that has influenced TCM for nearly two millennia.

The publication of "Xuan Yun Xin Fa" (New Methods for Dizziness) in later dynasties systematically categorized dizziness into patterns based on excess (Liver Yang, Phlegm-Dampness) and deficiency (Qi-Blood, Kidney Essence) mechanisms. This classification provided a structured framework for pattern differentiation that continues to guide TCM clinical reasoning.

This is an educational description of traditional TCM pattern frameworks. It is not a diagnosis or individualized treatment recommendation. TCM patterns are theoretical constructs used in traditional practice and are not equivalent to modern medical diagnoses.

Research on complementary approaches for dizziness and vertigo has explored acupuncture, herbal interventions, and lifestyle modifications. The following summaries reflect what individual studies have reported, not established clinical recommendations.

Acupuncture for Vertigo (Cochrane Review)

A 2011 Cochrane review by Jeon et al. (PMID: 21975755) evaluated acupuncture for treating idiopathic vertigo and found limited evidence suggesting a possible benefit compared to sham acupuncture. However, the review identified only two eligible trials with a combined total of 78 participants. The authors concluded that the evidence was insufficient to draw firm conclusions about the effectiveness of acupuncture for vertigo. High-quality, adequately powered randomized controlled trials are needed before any recommendation can be made.

Acupuncture for Meniere Disease

A 2020 systematic review by Li et al. examined acupuncture for Meniere disease and reported that some studies found acupuncture was associated with reduced vertigo frequency and improved hearing thresholds in small trials. However, the review noted substantial methodological limitations including small sample sizes, lack of adequate sham controls, inconsistency in acupuncture protocols, and publication bias. The overall evidence quality was rated as very low. Acupuncture for Meniere disease cannot be considered an established treatment based on current evidence.

TCM Herbs for Dizziness

Research on specific TCM herbs for dizziness is more limited than for acupuncture. Tian Ma (Gastrodia elata) and its active compound gastrodin have been studied in animal models and small clinical trials for neuroprotective, anticonvulsant, and vasodilatory effects. A 2019 systematic review by Liu et al. examined herbal formulas for vertigo and found that some studies reported reduced vertigo scores compared to controls, but study quality was generally low, formulations varied widely, and international replication was lacking. Ban Xia Bai Zhu Tian Ma Tang — the classical formula for Phlegm-Dampness dizziness — has been examined in several small Chinese studies with mixed results. No large, well-designed, international randomized controlled trials have established a specific TCM herbal intervention for dizziness or vertigo.

Comparison with Standard Vestibular Treatments

For BPPV, canalith repositioning maneuvers (Epley, Semont) are the first-line treatment with a strong evidence base and success rates exceeding 80% in many studies. For Meniere disease, treatment options include a low-salt diet, betahistine, diuretics, intratympanic gentamicin, and in refractory cases, surgery. For vestibular neuritis, vestibular rehabilitation exercises have robust evidence supporting their effectiveness. No TCM intervention has been directly compared against these established treatments in adequately powered, well-designed trials. Conventional vestibular treatments remain the evidence-based standard, and TCM approaches should be considered complementary rather than replacement options.

Overall Evidence Limitations

The research on TCM for dizziness has consistent gaps. Herbal studies are predominantly small, single-center, and conducted in China with limited international replication. Herbal preparations differ in composition, dose, and quality control, making cross-trial comparison difficult. Acupuncture studies struggle with blinding, protocol standardization, and sham control design. Few trials have used validated outcome measures (such as the Dizziness Handicap Inventory or vertigo-specific quality-of-life questionnaires). Long-term safety data are sparse. Bottom line: the evidence is not strong enough to establish a standard TCM treatment for dizziness or vertigo, and TCM should not replace conventional medical care when symptoms suggest an underlying condition requiring specific treatment.

Don't try to manage these symptoms with self-care or herbs alone — they need prompt conventional medical evaluation:

• Dizziness with sudden severe headache ("thunderclap" headache)
• Dizziness with sudden vision loss, double vision, or visual field changes
• Dizziness with difficulty speaking, slurred speech, or confusion
• Dizziness with weakness or numbness on one side of the face or body
• Dizziness with chest pain, palpitations, or irregular heartbeat
• Dizziness with fainting (syncope) or near-fainting (presyncope)
• Dizziness after head trauma, fall, or injury
• Dizziness with difficulty walking, severe imbalance, or inability to stand
• Dizziness with hearing loss, ringing in the ears, or ear fullness
• New, severe, persistent, or recurrent dizziness without a clear cause

Red Flags for Central Vertigo

Certain features suggest a central (brain) rather than peripheral (inner ear) cause and require urgent neurological evaluation. These include vertigo accompanied by neurological deficits (dysarthria, dysphagia, facial weakness, limb ataxia), severe headache, vertical nystagmus (upbeat or downbeat on straight gaze), direction-changing gaze-evoked nystagmus, and inability to walk even with support. The HINTS (Head-Impulse, Nystagmus, Test-of-Skew) examination battery is a validated bedside tool to help distinguish peripheral from central causes of acute vestibular syndrome.

Pregnancy and Breastfeeding

Dizziness during pregnancy is common and can be caused by hormonal changes, blood volume expansion, orthostatic hypotension, or hyperemesis gravidarum. However, any severe, sudden, or persistent dizziness during pregnancy requires immediate medical attention — it can signal preeclampsia, eclampsia, or other serious conditions. Individuals who are pregnant or breastfeeding should not use herbal products without obstetric guidance. Many herbs traditionally used for dizziness — including those that move Blood or subdue Yang — have insufficient safety data during pregnancy and may carry risks.

Children and Adolescents

Dizziness in children should be evaluated by a pediatrician or pediatric neurologist to rule out underlying conditions such as vestibular disorders, migraines, cardiac issues, anemia, or neurological conditions. Common causes in children include benign paroxysmal vertigo of childhood, vestibular migraine, and orthostatic hypotension. Do not give herbal products to children without pediatric guidance — safety data in this age group are extremely limited, and dosing has not been established.

Medication Interactions

Individuals taking anticoagulants (warfarin, clopidogrel), antiplatelet agents, antihypertensive medications, vestibular suppressants, or antiemetics should not add herbal products without consulting a qualified healthcare provider. Herbs that traditionally "subdue Yang" — like Gou Teng — may have hypotensive effects that could compound the action of antihypertensive drugs. Herbs that "invigorate Blood" — like Dan Shen, Chuan Xiong, and Hong Hua — may increase bleeding risk when combined with anticoagulants. Herbal products with sedative properties may interact with vestibular suppressants or anxiolytics.

Product Quality

Herbal supplements vary widely in quality, purity, and composition. Some products have been found to contain undeclared pharmaceuticals, heavy metals, or adulterants. Choose products from reputable manufacturers with third-party testing when possible, and be aware that TCM herbal products are less tightly regulated than prescription medications in many jurisdictions. Look for certifications from organizations like USP, NSF, or ConsumerLab when available.