The main cause of a transient ischemic attack (TIA) is a temporary blockage of blood flow within an artery leading to the brain. This blockage is usually caused by a blood clot or other type of debris that is carried through the bloodstream. When this blockage occurs, it can cause a wide range of symptoms depending on the area of the brain affected. Common symptoms of a TIA include temporary loss of vision, difficulty speaking, paralysis, and/or numbness on one side of the body. While the exact cause of a TIA is often unknown, some of the most common risk factors associated with the condition include high blood pressure, high cholesterol, smoking, diabetes, and obesity. Additionally, certain heart conditions, such as atrial fibrillation, can increase the risk of a TIA. It is important to note that although a TIA is typically temporary and may only last a few minutes, it can be a warning sign of an upcoming stroke or other serious condition and should be addressed immediately.