cause fainting

cause faintingFainting (syncope) is lost consciousness suddenly, usually only a few seconds or minutes, because your brain is not getting enough oxygen.The brain has multiple parts, including two hemispheres, the cerebellum, and brain stem. The brain requires blood flow to provide oxygen and glucose to the cells.For your body to stay awake, an area known as the reticular activating system located in the brain stem to live, and at least one hemisphere of the brain to function.Fainting occurs when the reticular activating system or both hemispheres of the brain is deprived of blood, oxygen, or glucose.1. Reaction vagus nerveFainting mostly triggered by the vagus nerve that connects the brain to the digestive system and play a role managing the bloodstream into the brain and gut. Overstimulation of the vagus nerve slows the heart rate and lowers blood pressure thus reducing the blood supply to the brain, causing fainting.Stress, fear, anxiety, panic, and pain that can powerfully stimulate the vagus nerve.2. Changes in blood pressureChanges in blood pressure can be meny________________________________________ebabkan you faint. Sometimes, the heart and blood vessels do not react fast enough when you change your body's need for oxygen. It is very common in the elderly and in people who have certain health conditions, such as diabetes. Fainting may occur if you stand too long or work harder than ability.3. AnemiaAnemia (lack of red blood cell count) can cause fainting because not enough red blood cells to supply oxygen to the brain. Anemia can be caused by lack of iron intake, disease or bleeding (eg, excessive menstruation).4. DehydrationLack of fluid in the body (dehydration) also can cause fainting. Dehydration can be caused by vomiting, diarrhea, fever, sweating, severe burns or drinking less. Some diseases such as diabetes can also lead to dehydration because of too frequent urination. Vomiting and diarrhea, in particular, also stimulates the vagus nerve that double effect.5. ShockShock is a condition characterized by low blood pressure which can lead to loss of consciousness. Shock is a dangerous state of emergency that usually comes from bleeding, but can also come from a severe allergy (anaphylaxis) or severe infections. Victims usually look confused shock, before losing consciousness when his condition worsened.6. DrugDrugs that are intended to control high blood pressure can act too much lower blood pressure causing fainting. Alcohol, cocaine and marijuana can also cause fainting. Talk with your doctor if you think your fainting may be related to medications you use.7. HypoglycemiaLack of blood sugar (hypoglycemia) can make you faint. Hypoglycemia is not only caused by diabetes, but also because you do not eat for a long time.Tips: What to do if you feel faint?Before fainting, you usually feel dizzy, dizzy, the room such as spinning, nausea and sweating. You may also experience blurred vision or hearing buzzing.If you feel like going to faint, lie down. If you can not lie down, sit and squat down to put your head between your knees.This helps the blood flow to your brain. Wait until you feel better before trying to stand. When you stand up, do it slowly.