Dizziness is a term used to describe a range of sensations, such as feeling faint, woozy, weak or unsteady. Dizziness that creates the false sense that you or your surroundings are spinning or moving is called vertigo.
Dizziness is one of the more common reasons adults visit their doctors. Frequent dizzy spells or constant dizziness can significantly affect your life. But dizziness rarely signals a life-threatening condition.
Possible Causes:
- Benign paroxysmal positional vertigo (BPPV). This condition causes an intense and brief but false sense that you’re spinning or moving. These episodes are triggered by a rapid change in head movement, such as when you turn over in bed, sit up or experience a blow to the head. BPPV is the most common cause of vertigo.
- Infection. A viral infection of the vestibular nerve, called vestibular neuritis, can cause intense, constant vertigo. If you also have sudden hearing loss, you may have labyrinthitis.
- Meniere’s disease. This disease involves the excessive buildup of fluid in your inner ear. It’s characterized by sudden episodes of vertigo lasting as long as several hours. You may also experience fluctuating hearing loss, ringing in the ear and the feeling of a plugged ear.
- Migraine. People who experience migraines may have episodes of vertigo or other types of dizziness even when they’re not having a severe headache. Such vertigo episodes can last minutes to hours and may be associated with headache as well as light and noise sensitivity.
Other causes of dizziness
- Neurological conditions. Some neurological disorders — such as Parkinson’s disease and multiple sclerosis — can lead to progressive loss of balance.
- Medications. Dizziness can be a side effect of certain medications — such as anti-seizure drugs, antidepressants, sedatives and tranquilizers. In particular, blood pressure lowering medications may cause faintness if they lower your blood pressure too much.
- Anxiety disorders. Certain anxiety disorders may cause lightheadedness or a woozy feeling often referred to as dizziness. These include panic attacks and a fear of leaving home or being in large, open spaces (agoraphobia).
- Low iron levels (anemia). Other signs and symptoms that may occur along with dizziness if you have anemia include fatigue, weakness and pale skin.
- Low blood sugar (hypoglycemia). This condition generally occurs in people with diabetes who use insulin. Dizziness (lightheadedness) may be accompanied by sweating and anxiety.
- Carbon monoxide poisoning. Symptoms of carbon monoxide poisoning are often described as “flu-like” and include headache, dizziness, weakness, upset stomach, vomiting, chest pain and confusion.
- Overheating and dehydration. If you’re active in hot weather or if you don’t drink enough fluids, you may feel dizzy from overheating (hyperthermia) or from dehydration. This is especially true if you take certain heart medications.
Treatment of dizziness depends on the cause and your symptoms.
Get emergency medical care if you experience new, severe dizziness or vertigo along with any of the following:
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- Sudden, severe headache
- Douleur thoracique
- Difficulty breathing
- Numbness or paralysis of arms or legs
- Fainting
- Double vision
- Rapid or irregular heartbeat
- Confusion or slurred speech
- Stumbling or difficulty walking
- Ongoing vomiting
- Seizures
- A sudden change in hearing
- Facial numbness or weakness
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