Lightheadedness describes feeling faint, unsteady, or as if you might pass out. It can stem from many sources—circulatory changes, metabolic issues, inner‑ear balance problems, medication effects, or anxiety. Details such as how the episode started, how long it lasts and accompanying symptoms help guide evaluation and referrals.
Lightheadedness is a sensation of near‑fainting or imbalance and is different from true vertigo, which creates a spinning or rotating sensation. Nausea, sweating, blurry vision, palpitations or generalized weakness can occur alongside lightheadedness. Clinicians focus on the pattern, triggers and associated signs to narrow possible causes.
Causes are varied: orthostatic low blood pressure, dehydration or low blood sugar, side effects of medications, inner‑ear (vestibular) disorders, anxiety or panic attacks, cardiac rhythm or circulation problems, migraine-related phenomena, and some neurological conditions. Age, recent illness, or new medications are important clues.
Seek immediate assessment if lightheadedness starts suddenly and severely, or if it occurs with chest pain, significant shortness of breath, fainting or changes in consciousness, weakness or numbness on one side of the body, slurred speech, double vision, or an unusually severe headache. These signs may indicate a serious cardiac or neurological event and warrant emergency services.
Primary care or internal medicine is usually the first contact. Depending on findings, referrals can include neurology (nervous system evaluation), cardiology (rhythm and circulation assessment), ENT/vestibular specialists (inner‑ear balance disorders), endocrinology (metabolic causes) and mental health professionals (anxiety). Common initial tests include blood tests, ECG, orthostatic blood pressure measurements and targeted imaging when indicated by the clinical exam.
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