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Dizziness is a term that is often used to describe 2 different symptoms: lightheadedness and vertigo.
Lightheadedness is a feeling that you might faint.
Vertigo is a feeling that you are spinning or moving, or that the world is spinning around you. See also:
Lightheadedness - dizzy; Loss of balance; Vertigo
Most causes of dizziness are not serious, and they either quickly get better on their own or are easy to treat.
Lightheadedness occurs when your brain does not get enough blood. This may occur if:
You have a sudden drop in blood pressure.
Your body does not have enough water (is dehydrated) because of vomiting, diarrhea, fever, and other conditions.
You get up too quickly after sitting or lying down (this is more common in older people).
Lightheadedness may also occur if you have the
flu, low blood sugar, a cold, or allergies.
More serious conditions that can lead to light-headedness include:
Heart problems, such as a heart attack or abnormal heart beat
Bleeding inside the body
Shock (extreme drop in blood pressure)
If any of these serious disorders are present, you will usually also have symptoms like chest pain, a feeling of a racing heart, loss of speech, change in vision, or other symptoms.
Vertigo may be due to:
Other causes of lightheadedness or vertigo may include:
Use of certain medicines
Bleeding in the brain
If you tend to get light-headed when you stand up:
Avoid sudden changes in posture.
Get up from a lying position slowly, and stay seated for a few moments before standing.
When standing, make sure you have something to hold on to.
If you have vertigo, the following tips can help prevent your symptoms from becoming worse:
Keep still and rest when symptoms occur.
Avoid sudden movements or position changes.
Slowly increase activity.
You may need a cane or other help walking when you have a loss of balance during a vertigo attack.
Avoid bright lights, TV, and reading during vertigo attacks because they may make symptoms worse.
Avoid activities such as driving, operating heavy machinery, and climbing until 1 week after your symptoms disappear. A sudden dizzy spell during these activities can be dangerous.
When to Contact a Medical Professional
Call your local emergency number (such as 911) or go to an emergency room if you are dizzy and have:
A head injury
Fever over 101°F (38.3°C), headache, or very stiff neck
Trouble keeping fluids down
Irregular heart rate (heart is skipping beats)
Shortness of breath
Inability to move an arm or leg
Change in vision or speech
Fainting and loss of alertness for more than a few minutes
Call your health care provider for an appointment if you have:
Dizziness for the first time
New or worsening symptoms
Dizziness after taking medicine
What to Expect at Your Office Visit
Your provider will perform a physical exam and ask questions about your medical history and symptoms, including:
When did your dizziness begin?
Does your dizziness occur when you move?
What other symptoms occur when you feel dizzy?
Are you always dizzy or does the dizziness come and go?
How long does the dizziness last?
Were you sick with a cold, flu, or other illness before the dizziness began?
Do you have a lot of stress or anxiety?
Tests that may be done include:
Blood pressure reading
Electrocardiogram ( ECG)
Balance testing ( ENG)
Magnetic Resonance Imaging (MRI)
Your provider may prescribe medicines to help you feel better, including:
Surgery may be needed if you have Meniere's disease.
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Chang AK, Olshaker JS. Dizziness and vertigo. In: Marx JA, Hockberger RS, Walls RM, eds.
Rosen's Emergency Medicine. 8th ed. Philadelphia, PA: Elsevier Saunders; 2014:chap 99.
Post RE, Dickerson LM. Dizziness: a diagnostic approach.
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