It is usually not possible to prevent fainting. An individual should seek treatment for underlying conditions, such as anemia or diabetes. Drinking enough fluids is important in preventing dehydration. A diet high in fiber and fluids can help prevent straining to have a bowel movement. A person with a history of fainting should stand up slowly. Those who feel as though they may faint should sit or lie down. This simple step often prevents fainting.
People who faint may hurt themselves when they fall. Long-term effects are mainly related to the underlying cause of the fainting. Those who have heart disease often have an increased risk of complications and death.
Fainting is not contagious and poses no risk to others.