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. Vertigo-associated disorders is a related topic.
Alternative Names
Lightheadedness - dizzy; Loss of balance; Vertigo
Considerations
Most causes of dizziness are not serious, and they either quickly get better on their own or are easy to treat.
Causes
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, or 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, allergies, or take medicines that may lower your blood pressure.
More serious conditions that can lead to lightheadedness include:
Heart problems, such as a heart attack or abnormal heart beat
Stroke
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.
Other causes of lightheadedness or vertigo may include:
Use of certain medicines
Stroke
Multiple sclerosis
Seizures
Brain tumor
Bleeding in the brain
Home Care
If you tend to get lightheaded 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
Seizures
Trouble keeping fluids down
Chest pain
Irregular heart rate (heart is skipping beats)
Shortness of breath
Weakness
Inability to move an arm or leg
Change in vision or speech
Fainting and loss of alertness for more than a few minutes
Contact your health care provider for an appointment if you have:
Dizziness for the first time
New or worsening symptoms
Dizziness after taking medicine
Hearing loss
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 or get worse 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?
Muncie HL, Sirmans SM, James E. Dizziness: approach to evaluation and management. Am Fam Physician. 2017;95(3):154-162. PMID: 28145669 pubmed.ncbi.nlm.nih.gov/28145669/.
Review Date:
4/27/2023
Reviewed By:
Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.