Dizziness or Lightheadedness is a feeling of faintness or being close to passing out. It can occur alongside vertigo, which affects balance and makes a person feel as though they or their surroundings are spinning. Although lightheadedness and vertigo can feel similar, they have different causes. Some of the common causes of lightheadedness are: Hypertension Dehydration Sudden positional changes Migraine Ear Infection Stress Here are a few tips on how to prevent dizziness: Dr