Vertigo is the sensation that an individual or the world around him is spinning. Doctors divide vertigo into two categories. Peripheral vertigo relates to the balance inside the inner ear and could be triggered by infection, injury, or medication. Central vertigo is rarer and is usually caused by damage to the central nervous system. Vertigo can last for minutes, hours, or continue for days.
Benign paroxysmal positional vertigo (BPPV) occurs when tiny crystals break off from the inner ear canal and overstimulate hair cells that are sensitive to movement. This "tricks" the brain into thinking that motion is occurring when it isn't. It is the most common cause of vertigo. Certain head movements, such as bending down or turning to the side while lying in bed, can trigger dizziness. BPPV episodes generally last only a few minutes. The condition usually poses no dangers other than the risk of falling and does not require treatment. People over 50 are more likely to experience BPPV.
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