Fainting could be triggered by a combination of genetic and environmental factors, a study involving twins has found.
University of Melbourne and Austin Health research found identical twins, who have identical sets of genes, were almost twice as likely to faint as non-identical twins.
The study examined 51 sets of
twins aged between nine and 69 with a history of fainting.
Fainting can be caused by the body's reaction to typical triggers, such as injury or the sight of blood, or environmental factors like heat.
The study found identical twins fainted more than non-identical twins and were also more likely to report environmental triggers, such as heat, as the cause.
