![]() ![]() If you have time, take off tight clothing so you can breathe more easily. If you are about to faint, lie down on the floor. You may feel clammy and look pale, and you may have blurred vision or hear ringing in your ears. ![]() Symptoms of fainting may include dizziness and lightheadedness before you faint. Narrowing of the main artery from the heart (aortic stenosis).Enlarged heart muscle (hypertrophic cardiomyopathy).Abnormal heart rhythms (cardiac arrhythmias).Some of the most common are listed below. There are also a variety of known medical conditions that cause fainting. Exposure to blood or blood-drawing proceduresĪlcohol use can also lead to vasovagal syncope because it causes dehydration and lowers blood sugar levels.Standing for a long time, especially in hot weather.This is also known as neuro-cardiogenic or vasodepressor syncope. This occurs when the vagus nerve, which helps control heart rate and blood vessel constriction, is stimulated in a way that slows the heart rate and dilates blood vessels. Some medicines can also cause fainting.Īnother cause of fainting is vasovagal syncope. Sudden collapse causes can be linked to not getting enough oxygen to the brain, low blood sugar (hypoglycemia), dehydration, overheating and heart problems. You have diabetes and feel very sick after fainting.You feel lightheaded or weak before you faint.You’re older than 50 and faint while standing up.However, it also can be a sign of something serious.Ĭall 911 or go to the emergency room right away if: Most of the time fainting is nothing to worry about. You can also faint if you stand up too fast or if you hold your breath for too long. You may faint if you’re in pain, have a sudden drop in blood pressure or simply don’t get enough blood to your brain. It can last a few seconds to a few minutes and is usually followed by a quick recovery. Fainting, or syncope, is a sudden loss of consciousness without warning caused by a decrease in blood flow to the brain. ![]()
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