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Why do you get dizzy?
Dizziness is a symptom of many different body system conditions and mechanisms. One cause is disruption of the normal feedback to the brain about the body's position in space.… If the gel-like fluid in the semicircular canals (part of the inner ear) are moved too far or in opposing directions by spinning or other rapid changes in position, the "hairs" (cilia) inside the canals send signals to the brain that can confuse spacial orientation. The abnormal motion of the cilia, and other structures in the canals, send conflicting signals to the brain. This unconscious data, sometimes coupled with the information about spacial orientation that the brain is receiving simultaneously from the eyes, can lead to varying degrees of dizziness. Dizziness can also be caused by changes in the central nervous system and altered states of mind by opioids or other drugs, alcohol, or chemicals. Similarly, vertigo (dizziness) can be caused by anxiety, pain, fear, migraines, dementia and mental confusion, strokes and damaging high blood pressure, concussions and more severe head injuries. Neuropathy (disorders of the nerves), such as that in complications of Diabetes can also create this effect. Weakness from dehydration, electrolyte imbalance, low blood sugar, low blood pressure, common colds and flu can also cause dizziness. Anything that creates low oxygenation of the brain (hypoxia) will also cause this symptom. That can range from blood loss and anemia to cardiac and pulmonary diseases. Some examples are: hardening of the arteries in the brain or vessels leading to the brain; clots or occlusions of those vessels; heart rates too fast or too slow; hyperventilation; heart failure or damage from heart attacks; the heart's electrical stimulation malfunctioning (e.g., heart block); pneumonia and bronchitis; asthma; allergies; excessive G-Force as experienced by pilots and astronauts; etc. (MORE)