what causes you to get light headed
When this happens, lightheadedness and fatigue may be the first noticeable symptoms that you are losing blood. Heavy menstrual bleeding also can cause this type of lightheadedness. Sometimes the cause of lightheadedness is an abnormal heart rhythm (arrhythmia), which can cause fainting spells (syncope). Unexplained fainting spells need to be evaluated by a doctor. You can check your heart rate by taking your pulse.
1 If you have lightheadedness because of vestibular migraine, your doctor may help you figure out what triggers your attacks, such as diet, stress, sleep and exercise. 2  Your doctor may also prescribe to help prevent attacks or relieve nausea.