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What causes dizziness after bending?

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Quick Answer

Paroxysmal positional vertigo, a condition that can develop as a person ages or after suffering a head injury, causes dizziness after bending, according to the National Institutes of Health. The inner ear contains minute calcium crystals, and when they shift from their normal positions, vertigo can occur. To treat patients in such cases, physicians reposition the crystals by moving the body and head carefully. Low blood pressure can also cause dizziness when a person stands up quickly.

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Determining the cause of a balance problem can be difficult because balance is a multifaceted function, notes the National Institutes of Health. Balance disorders can occur due to joint, muscle, bone or vision problems. Other balance problems result from ear infections and taking certain medications. It is common for people to experience an episode of benign paroxysmal positional vertigo when bending over or making a sudden head movement. Clinical studies show that repositioning the calcium crystals in the head is an effective treatment for this type of vertigo.

Otoliths are the tiny calcium crystals that can dislodge from their position in the ear and cause benign paroxysmal positional vertigo, according to WebMD. When the particles move from their positions, a person perceives head movement when there is no movement. A physician can reposition the crystals in about two minutes by executing the Epley maneuver, a therapy that is successful about 80 percent of the time.

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