What blood pressure reading is considered low, and when should I be concerned?

Low blood pressure, or hypotension, is generally defined as a blood pressure reading of 90/60 mmHg or lower. A blood pressure measurement consists of two numbers: the top number (systolic pressure) represents the pressure on artery walls when the heart pumps blood, while the bottom number (diastolic pressure) represents the pressure when the heart is resting between beats [1].

When is low blood pressure normal?

For some people, low blood pressure is normal for them at all times and does not cause any symptoms. In these cases, low blood pressure is not a cause for concern and does not require treatment [1]. For example, a reading of 90/60 mmHg or lower may be completely normal if it is not accompanied by any feeling of dizziness, fainting, or other symptoms [2].

When should low blood pressure be a concern?

Low blood pressure becomes a problem when it causes symptoms or is linked to a specific medical condition or medication [1]. It is important to pay attention to symptoms that may indicate that low blood pressure is not normal and requires medical evaluation. These symptoms include:

• Dizziness or lightheadedness [2]
• Fainting [2]
• Feeling tired or weak [2]
• Blurred vision [2]
• Nausea [2]
• Headache [2]
• Confusion [2]
• Heart palpitations (feeling that the heart is beating strongly or rapidly) [2]

If you experience these symptoms regularly, or if you notice a sudden drop in blood pressure, it is necessary to consult a doctor to determine the cause and appropriate treatment. Low blood pressure can be associated with conditions such as dehydration, blood loss, heart problems, diabetes, or certain medications [2]. You can learn more about this topic by visiting the article Low blood pressure: When is it normal and when is it concerning? (Arabic).

What should you do when experiencing symptoms of low blood pressure?

If you feel symptoms of low blood pressure, such as dizziness or lightheadedness, sitting down may help alleviate the symptoms [2]. It is important not to ignore these symptoms, especially if they are frequent or severe. A doctor may request additional tests, such as blood tests, urine tests, imaging, or a tilt-table test if you suffer from frequent fainting [2].

When is low blood pressure a medical emergency?

In some severe cases, low blood pressure can lead to shock, a life-threatening condition that requires immediate medical attention. Shock occurs when vital organs in the body do not receive enough oxygen and nutrients [2]. Signs of shock include:

• Cold and clammy skin [2]
• Rapid breathing [2]
• Bluish skin tone [2]
• A weak and rapid pulse [2]

If you notice any of these signs in yourself or someone else, you must seek emergency medical help immediately [2].

Medical references

• Low Blood Pressure
• Low Blood Pressure Low Blood Pressure