AllRefer Health - Caring for your Well Being

Home | About | FAQs | Contact Us

AllRefer Channels :: Yellow Pages | Reference | Health  

Symptoms Guide
Select & Go
 Diet & Nutrition
 Diseases & Conditions 
 Injuries & Wounds
 Poisons & Overdoses
 Surgery & Procedures 
 Symptoms Guide
 Special Topics
 Tests & Exams
 Pictures & Images
 Medical Encyclopedia

You are here : AllRefer.com > Health > Medical Symptoms > Fainting

Fainting

Alternate Names : Passed out, Light-headedness - fainting, Syncope, Vasovagal episode


Definition

Fainting is a temporary loss of consciousness due to a drop in blood flow to the brain. The episode is brief (lasting less than a couple of minutes) and is followed by rapid and complete recovery. You may feel light-headed or dizzy before fainting.

A longer, deeper state of unconsciousness is often called a coma.

Overview & Considerations

When you faint, you not only experience loss of consciousness, but also loss of muscle tone and paling of color in your face (pallor). You may also feel weak or nauseated just prior to fainting, and you may have the sense that surrounding noises are fading into the background.

Common Causes

Fainting may occur while you are urinating, having a bowel movement (especially if straining), coughing very hard, or when you have been standing in one place too long. Fainting can also be related to fear, severe pain, or emotional distress.

A sudden drop in blood pressure can cause you to faint. Your blood pressure may drop suddenly if you are bleeding or severely dehydrated. It can also happen if you stand up very suddenly from a lying position.

Certain medications may lead to fainting by causing a drop in your blood pressure or for another reason. Common drugs that contribute to fainting include those used for anxiety, high blood pressure, nasal congestion, and allergies.

Other reasons you may faint include hyperventilation, drug or alcohol use, and low blood sugar.

Less common but more serious reasons for fainting include heart disease (such as abnormal heart rhythm or heart attack) and stroke. These conditions are more likely in persons over age 65 and less likely in those younger than 40.





Quick Jump
1 | 2 | 3

Next
Treatment

Jump To Another Page

Review Date : 5/3/2009
Reviewed By : David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.



Featured Topics

Alzheimer's Disease

High Blood Pressure

Crohn's Disease

Impotence

Overactive Bladder

ADAM

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org). URAC's accreditation program is the first of its kind, requiring compliance with 53 standards of quality and accountability, verified by independent audit. A.D.A.M. is among the first to achieve this important distinction for online health information and services. Learn more about A.D.A.M.'s editorial reviewers. A.D.A.M. is also a founding member of Hi-Ethics (www.hiethics.com) and subscribes to the principles of the Health on the Net Foundation (www.hon.ch).

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. Copyright 2003 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

This website is certified by Health On the Net Foundation. Click to verify.
This site complies to the HONcode standard for trustworthy health information: verify here.
Copyright © 2013 AllRefer.com All Rights reserved.
Health Topics: 0-9 A-AID Air-Aor Aor-Azo B-Blo Blo-Bys C-Cha Cha-Col Col-CSF CSF-Cyt D-Dis Dis-Dys E-Ess Est-Eye F-FSP FTA-Fus G H-Her Her-Hys I-Iod Ion-Ivy J K L-Luc Lud-Lym M-Min Min-Myx N O P-Pes Pes-Pre Pre-Pyr Q R-Rig Rig-RVA s-SID SID-Spu Spu-Sys T-Too Too-Typ U V W X Y Z
About Us | Help | Privacy Policy | Editorial Policy | Advertising Policy | Accessibility | Terms of Use
Contact Us | Link to Us
Page Last Updated: 01 Nov, 2014