Dizziness in summer: Don't blame the heat alone, experts warn

As temperatures and humidity soar during summer, many people experience sudden dizziness, a symptom often dismissed as mere dehydration or a reaction to air conditioning. However, medical experts caution that these sensations, ranging from feeling faint to a spinning world, can signal more serious underlying conditions. Dr. Jo Sung-yoon of Regenes Neurosurgery Clinic emphasizes that dizziness is not a single diagnosis but a symptom with diverse causes. He stresses the importance of noting when dizziness began, how long it lasted, and if specific head movements trigger it, rather than just the sensation itself.

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Summer dizziness is often mistaken for anemia or cooling sickness, but one must examine the onset and duration of symptoms.

While dehydration and low blood pressure can cause lightheadedness or a feeling of impending collapse, particularly when standing up, more concerning causes exist. Inner ear disorders like benign paroxysmal positional vertigo (BPPV), commonly known as BPPV, can cause brief, intense spinning sensations with head movements. Although direct links between heat and BPPV are unclear, summer's heat can exacerbate dehydration, potentially leading to dizziness that might be misattributed. Medical professionals diagnose BPPV through specific positional tests and treat it with repositioning maneuvers.

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If accompanied by sudden walking difficulties, double vision, or speech abnormalities, stroke should be suspected.

More critically, sudden, severe dizziness accompanied by an inability to walk straight, double vision, slurred speech, facial drooping, or numbness in limbs could be signs of a posterior circulation stroke affecting the cerebellum or brainstem. Such symptoms warrant immediate emergency medical evaluation. Even if these severe symptoms resolve quickly, they could indicate a transient ischemic attack (TIA), necessitating urgent assessment. Dr. Jo advises that any dizziness previously unexperienced, severe enough to impair walking, or coupled with visual or speech disturbances, should prompt an immediate visit to the emergency room.

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Dizziness is not a disease name but a symptom that appears due to various causes.