Low blood pressure, which can cause fainting or dizziness because the brain doesn't receive enough blood.


Rise slowly from sitting or lying down, avoid alcohol, eat fruits and vegetables, and be sure to get plenty of water. Eating small, low-carbohydrate meals may also help.

When to seek immediate medical care

See a doctor immediately if:

  • Fainting
  • Cold sweats
  • Rapid, shallow breathing
  • Blood in stool

When to make a doctor's appointment

Make an appointment to see a doctor if:

  • Dizziness or lightheadedness
  • Fatigue
  • Lack of concentration
  • Taking medication that might cause drop in blood pressure

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