A transient ischemic attack (TIA) is a stroke that comes and goes quickly. It happens when a blood clot blocks a blood vessel in your brain. This causes the blood supply to the brain to stop briefly. Symptoms of a TIA are like other stroke symptoms, but do not last as long. They happen suddenly, and include
Numbness or weakness, especially on one side of the body
Confusion or trouble speaking or understanding speech
Trouble seeing in one or both eyes
Loss of balance or coordination
How long do your symptoms last? The symptoms of a TIA last from an hour up to 24 hours. If you seriously think this is what's happening, you need to see your doctor quickly.