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About this Condition
People faint for many reasons, including:
Some causes of fainting are not easy to explain, and some causes of unexplained fainting can be life-threatening. Whether you have isolated unexplained fainting spells or you repeatedly faint, you should seek the help of a doctor.
Usually fainting occurs while standing. It may happen suddenly or may be preceded by a sensation of:
If you faint during exercise or experience dizziness, heart palpitations, or seizure-like episodes, you should see a doctor.
While some causes of unexplained fainting are harmless, others may be serious. Heart-related causes, including abnormal heart rhythms, are among the most serious causes of fainting. Also, if you do not have any warning signs before you faint, you may fall unexpectedly and be injured.
A correct diagnosis of infrequent but recurring fainting starts with gathering the facts about your own fainting spells. Your doctor or team of doctors may take a medical and family history and perform a physical exam. If your doctor suspects a heart condition is causing your fainting, diagnostic tests may be run to gather information about your heart.
Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.