Common Low Blood Pressure Causes You Should Know About

While high blood pressure often receives significant attention, low blood pressure (hypotension) can also be a health concern. Low blood pressure occurs when the force of blood against your artery walls is lower than normal. 

Typically, normal blood pressure for most adults is 120/80 mm Hg or slightly lesser. However, when the blood pressure of a person is lower than 90/60 mm Hg it is considered as low blood pressure. This can lead to a range of symptoms, affecting your daily life and overall well-being. 

In this blog post, let us see the various low blood pressure causes that can affect an individual and what you can do if you develop symptoms of low blood pressure.   

Low Blood Pressure Causes 

Several factors can contribute to low blood pressure, and it's essential to identify the underlying cause to receive appropriate treatment.   

Dehydration

One of the most common low blood pressure causes is dehydration. When your body loses more fluids than it takes in, your blood volume can decrease, leading to lower blood pressure. This can be caused by excessive sweating, vomiting, diarrhoea, or simply not drinking enough fluids.   

Medication Side Effects

Certain medications, such as those used to treat high blood pressure (diuretics, beta-blockers, ACE inhibitors), heart conditions, or depression, can lower blood pressure as a side effect.   

Heart Conditions

Underlying heart problems, such as a slow heart rate (bradycardia), heart valve problems, or heart failure, can affect the heart's ability to pump blood effectively, resulting in low blood pressure.   

Endocrine Disorders

Conditions that affect hormone production, such as diabetes, adrenal insufficiency (Addison's disease), or thyroid disorders, can disrupt the body's fluid balance and blood pressure regulation.   

Neurological Conditions

Neurological disorders like Parkinson's disease can interfere with the nervous system's control of blood pressure.   

Nutritional Deficiencies

Severe deficiencies in essential nutrients like vitamin B12 or folate can lead to anaemia, which in turn can cause low blood pressure.   

Pregnancy

During pregnancy, hormonal changes and increased blood flow to the foetus can cause a drop in blood pressure, especially in the second trimester.   

Postprandial Hypotension

This refers to a sudden drop in blood pressure after eating, often affecting older adults.   

Orthostatic Hypotension

This type of low blood pressure occurs when you stand up suddenly after sitting or lying down. It's common in older adults and can be caused by dehydration, medication side effects, or neurological conditions.   

Symptoms of Low Blood Pressure

Low blood pressure can manifest in various ways, and the severity of symptoms can vary from person to person. Common symptoms include:   

• Dizziness or light-headedness: Feeling faint or unsteady, especially when standing up quickly.   
• Fainting (syncope): Brief loss of consciousness due to inadequate blood flow to the brain.   
• Blurred vision: Temporary vision disturbances.   
• Fatigue: Feeling tired or weak.
• Nausea: Feeling sick to your stomach.   
• Confusion: Difficulty concentrating or thinking clearly.   
• Cold, clammy skin: Pale and cool skin due to reduced blood flow.   
• Rapid, shallow breathing: Increased breathing rate to compensate for low oxygen levels.

What to Do If You Have Low Blood Pressure

1. If you feel faint, sit or lie down immediately. This helps improve blood flow to the brain.

2. Drink plenty of fluids, especially water or electrolyte drinks, to increase blood volume.   

3. Elevate your legs when sitting or lying down to promote blood flow towards the heart.   

4. Be cautious when standing up from a sitting or lying position. Get up slowly and gradually.

5. If you experience frequent or severe symptoms, consult a doctor to identify the underlying cause and receive appropriate treatment.

Summing Up

Low blood pressure can have diverse underlying low blood pressure causes, ranging from simple dehydration to more complex medical conditions. 

If you experience frequent symptoms of low blood pressure, it's crucial to seek medical advice for proper diagnosis and management. Identifying the root cause is the first step towards effective treatment and preventing potential complications.   

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Sources:

https://www.mayoclinic.org/diseases-conditions/low-blood-pressure/symptoms-causes/syc-20355465   

https://my.clevelandclinic.org/health/diseases/21156-low-blood-pressure-hypotension#symptoms-and-causes