Blood pressure is one of the vital signs that your physician takes every time you have an appointment. This is imperative because it indicates how much pressure is put on the artery walls when your heart beats and when it is at rest. 

That being said, very high or very low blood pressure may indicate an underlying problem. In fact, low blood pressure (hypotension) can lead to a headache. This is according to research by NIH on low blood pressure, which states that headache is one of the symptoms of low blood pressure.  Therefore, suggesting that there is a link between low blood pressure and headaches.

Here is a brief elucidation on the link between low blood pressure and headache.

Low Blood Pressure

Also known as hypotension, low blood pressure occurs when there is low blood flow through the arteries and the veins. Put briefly, low blood pressure is that which is lower than 90/60 mm Hg since a healthy blood pressure for most adults tends to be less than 120/80 mm Hg.

The severity of low blood pressure is often undermined. One of the main reasons behind this, as the NHLB notes, is that blood pressure often goes unnoticed by many people. In the same token, there is no specific level that constitutes dangerous low blood pressure. Therefore, alarms are usually not raised.

Low Blood Pressure and Headaches: The Link

Hypotension may result in headaches. These types of headaches are known as orthostatic, and they occur when there is a drastic change in the blood pressure of your head. 

That being said, orthostatic headaches present themselves as normal headaches. Therefore, it is often difficult to distinguish them.

Cause of Headaches

If  you have low blood pressure, then you may experience a headache as a result of :

  • Change in posture (Orthostatic hypotension)
  • Dizziness
  • Taking medication that may cause you to lose more liquid leading to a decrease in blood volume.

However, your physician may test you to determine the underlying cause of your hypotension that leads to headaches. Such causes include:

  • Cerebral spinal fluid(CSF) fistula
  • Spontaneous intracranial hypotension
  • Post-Dural puncture.

 Other Causes of Low Blood Pressure

Low blood pressure may arise due to multiple causes, including medications, underlying conditions, and your health and other daily activities. 

The NHLBI highlights the following causes of low blood pressure:

  • Bleeding
  • Ageing
  • Pregnancy
  • Diabetes
  • Dehydration
  • Medical problems

What are the Other Symptoms of Low Blood Pressure?

 Apart from headaches, you may experience the following symptoms due to low blood pressure:

  • Nausea and vomiting
  • Back pain
  • Fatigue
  • Blurred vision
  • Fainting and depression 

If you experience these symptoms, then you are likely to have low blood pressure.


In order to treat your secondary headache resulting from hypotension, your doctor will simply need to treat the underlying cause. Once low blood pressure has been brought to ‘normal’, and under control, your headaches are bound to disappear. 

Bottom Line

Low blood pressure is generally not a cause for concern. However, if you experience headaches, then it is imperative that you consult a doctor. This helps in diagnosing and treating the underlying condition that relates to low blood pressure.

Contact Stop Migraines today if you or your loved one is experiencing headaches.  Let us help you overcome this debilitating condition.