What are the warning signs of a stroke?

A stroke happens when part of your brain is not getting enough blood and stops working. Depending on the part of the brain that is damaged, a stroke can cause

• sudden weakness or numbness of your face, arm, or leg on one side of your body
  
  
• sudden confusion, trouble talking, or trouble understanding
  
  
• sudden dizziness, loss of balance, or trouble walking
  
  
• sudden trouble seeing in one or both eyes or sudden double vision
  
  
• sudden severe headache
  

Sometimes, one or more of these warning signs may happen and then disappear. You might be having a "mini-stroke," also called a TIA (transient ischemic [TRAN-see-unt is-KEE-mik] attack). If you have any of these warning signs, tell your doctor right away.

source: http://diabetes.niddk.nih.gov/dm/pubs/complications_heart/index.htm