Fainting may have a variety of causes. A simple episode, also called a vasovagal attack or neurally-mediated syncope, is the most common type of fainting spell. It is most common in children and young adults. A vasovagal attack happens because blood pressure drops, reducing circulation to the brain and causing loss of consciousness.
Diabetes mellitus type 1. Diabetes mellitus type 1 (also known as type 1 diabetes) is a form of diabetes mellitus in which not enough insulin is produced. The lack of insulin results in high blood sugar levels. The classical symptoms are frequent urination, increased thirst, increased hunger, and weight loss.
In type 1 diabetes, the pancreas does not produce insulin. Type 1 diabetes is considered an autoimmune disorder. The condition is usually first diagnosed in childhood or adolescence. Patients with type 1 diabetes need to take daily insulin for survival.