What causes sudden dizziness or lightheadedness? Factors range from insulin spikes and nutritional deficiencies to positional changes and physical exertion in the cold.
Dizziness, or vertigo, is the sensation that the world is moving around you. It may stem from imbalanced or excessive inner-ear fluids, inner-ear inflammation, migraines or, in rare cases, brain hemorrhage, multiple sclerosis or stroke. Hypoglycemia, or low-blood sugar, can also cause dizziness.
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Dizziness, or feeling unbalanced or lightheaded, and nausea, the feeling that precedes vomiting, are symptoms of numerous of conditions. In some cases, dizziness and nausea are brief, mild and temporary symptoms, caused by riding on a roller coaster or consuming small amounts of harmful bacteria.
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