Low Blood Pressure

What is Low Blood Pressure?

Low blood pressure, medically known as hypotension, is generally described as a blood pressure reading below 90/60 mmHg. It can reduce blood flow to important organs or cause symptoms such as dizziness, fainting, confusion, weakness or blurred vision.

However, a reading below 90/60 mmHg does not automatically mean that a person has a medical problem. Some healthy people naturally have lower blood pressure and do not require treatment. Doctors consider whether the person has symptoms of low BP, whether the reading is persistently low and whether an underlying medical condition or medicine may be responsible.

A sudden and severe fall due to low BP can be particularly serious, as it may occur with conditions such as severe blood loss, dehydration, serious infection or a severe allergic reaction.

What are the Types of Low Blood Pressure?

Low blood pressure can occur in different circumstances. The various types of low blood pressure include:

How Common is Low Blood Pressure in India?

Low blood pressure is quite common in India. However, there is no reliable national estimate regarding the prevalence of low blood pressure in India. Research has been performed mainly on orthostatic hypotension, especially among older adults in some communities.

A community-based study carried out in Thiruvananthapuram, Kerala, in 2022 found that 9.6% of the people had orthostatic hypotension at the third minute after standing. It also found that the condition occurred more frequently in people who had medical disorders and were on medicines.

What are the Symptoms of Low Blood Pressure?

Low blood pressure does not always cause symptoms. Symptoms are more likely to develop when the fall in blood pressure reduces blood flow to the brain or other organs.

Common symptoms of low blood pressure include:

Some people may notice symptoms particularly after standing, during hot weather, after eating, during dehydration or after taking certain medicines. Fainting can also result in falls and injuries. Therefore, repeated episodes should be medically evaluated rather than being attributed to low blood pressure without investigation.

Severe symptoms require urgent attention, particularly when low blood pressure occurs with chest pain, breathlessness, severe weakness, confusion, cold and clammy skin, a rapid weak pulse or loss of consciousness.

Diseases Similar to Low Blood Pressure

Low blood pressure can sometimes be confused with high blood pressure or anaemia, as dizziness, weakness and fatigue can occur in these conditions. However, their causes and effects on the body are different.

Below is a comparison between diseases similar to low blood pressure:

Low Blood Pressure vs. High Blood Pressure vs. Anaemia

These conditions should not be diagnosed based on symptoms alone. Appropriate testing is needed to identify the cause.

What Causes Low Blood Pressure?

Common causes of low blood pressure include:

• Dehydration: Loss of fluid through vomiting, diarrhoea, fever, sweating or inadequate fluid intake can reduce blood volume.

• Blood Loss: Significant bleeding can reduce circulating blood volume and cause a sudden fall in blood pressure.

• Medicines: Some medicines, including certain medicines used for high blood pressure, heart conditions and other health problems, can lower blood pressure or affect the body's ability to regulate it.

• Heart Problems: Heart failure, abnormal heart rhythms and certain heart valve conditions can interfere with the heart's ability to maintain adequate circulation.

• Hormonal Conditions: Problems involving the adrenal glands, thyroid or other parts of the endocrine system can affect blood pressure regulation.

• Diabetes-Related Nerve Damage: Diabetes can damage the autonomic nerves that help regulate blood pressure, increasing the risk of orthostatic hypotension.

• Pregnancy: Changes in the circulatory system during pregnancy can cause blood pressure to fall, particularly during the first and second trimesters.

• Anaemia: Anaemia itself does not always cause hypotension. However, conditions involving significant blood loss can contribute to both anaemia and low blood pressure.

• Severe Infection: Serious infections can cause a dangerous fall in blood pressure and may lead to septic shock.

• Severe Allergic Reaction: Anaphylaxis can cause blood vessels to widen suddenly, leading to a rapid fall in blood pressure.

• Autonomic Nervous System Disorders: Conditions affecting the autonomic nervous system can interfere with the body's normal response to standing and other changes.

• Prolonged Bed Rest: Extended inactivity can reduce the body's ability to adjust blood pressure when a person becomes upright, particularly in people who are already vulnerable to orthostatic hypotension.

As low blood pressure can have many causes, treatment should focus on identifying the reason for the low reading rather than simply trying to raise blood pressure.

What are the Risk Factors for Low Blood Pressure?

The risk of hypotension depends largely on its underlying cause. Some factors can make certain types of low blood pressure more likely. The common risk factors for low blood pressure are as follows:

When Should I See a Healthcare Provider?

You should arrange a medical evaluation if you repeatedly experience:

• Dizziness or light-headedness

• Fainting or near-fainting

• Symptoms after standing up

• Repeated weakness associated with low blood pressure

• Blurred vision or difficulty concentrating

• New symptoms after starting or changing a medicine

• Recurrent falls or unsteadiness

A blood pressure reading below 90/60 mmHg accompanied by symptoms should be discussed with a healthcare professional. The urgency is particularly high when hypotension follows major blood loss, a serious injury, a suspected severe infection or a severe allergic reaction.

How is Low Blood Pressure Diagnosed?

Diagnosis begins with confirming the blood pressure reading and identifying why it is low. A single low reading is not always enough to establish a medical problem. Some common diagnostic measures to confirm low blood pressure are as follows:

Diagnostic Summary Table

How is Low Blood Pressure Managed and Treated?

Treatment of low blood pressure depends on the underlying cause and whether the person has symptoms. People who naturally have low blood pressure but feel well may not require treatment.

Common treatment measures recommended by doctors for low blood pressure may include:

• Treating the Underlying Cause: Dehydration, blood loss, infection, anaemia, heart disease, or other underlying conditions should be addressed according to medical advice.

• Reviewing Medicines: If a medicine contributes to low blood pressure, the doctor may adjust the dose or consider an alternative. Medicines should not be stopped without a doctor’s advice.

• Maintaining Adequate Fluid Intake: Drinking enough fluid may help when dehydration contributes to hypotension. People with heart, kidney or other conditions requiring fluid restriction should follow their doctor's advice.

• Changing Position Slowly: Moving gradually from lying to sitting and then standing can reduce symptoms of orthostatic hypotension.

• Compression Garments: Compression stockings or other compression garments may help selected people by reducing blood pooling in the legs.

• Smaller Meals: Smaller meals may help people who experience postprandial hypotension.

• Appropriate Salt Intake: Some people with particular forms of hypotension may be advised to increase salt intake. This should only be done after medical advice because excess sodium can be harmful for people with certain heart, kidney or blood pressure conditions.

• Physical Counter-Manoeuvres: Certain leg and abdominal muscle-tensing manoeuvres may help reduce symptoms in people with orthostatic hypotension.

• Regular Physical Activity: Appropriate physical activity may help circulation and physical conditioning, particularly in people with postural symptoms.

The goal is not simply to increase the blood pressure number. Treatment aims to reduce symptoms, prevent falls and complications, and address the condition causing the hypotension.

Common Medicines Used to Treat Low Blood Pressure

The common medicines prescribed by doctors to treat blood pressure are as follows:

• Fludrocortisone: Fludrocortisone causes the body to retain sodium and water and increase blood volume. It can be used in certain types of chronic orthostatic hypotension.

• Midodrine: Midodrine causes blood vessels to narrow and may increase blood pressure while a person is standing. It is usually used in symptomatic orthostatic hypotension.

• Droxidopa: Droxidopa increases the amount of noradrenaline and can help raise blood pressure when standing. It is used in some cases of neurogenic orthostatic hypotension.

• Pyridostigmine: Pyridostigmine may help to regulate blood pressure in some people with orthostatic hypotension, especially if other treatment methods are not suitable.

• Octreotide: Octreotide can be used in cases of severe postprandial hypotension, especially when blood pressure drops significantly after eating.

Note: The treatment of low blood pressure depends on the individual’s symptoms, overall health, and severity of the condition. As treatment needs can vary, medicines should always be taken under the guidance and supervision of a qualified healthcare professional.

Living With Low Blood Pressure: Challenges and Caregiving

Many people with naturally low blood pressure and no symptoms can live normally without specific treatment. Persistent or symptomatic hypotension can, however, affect mobility, daily activities and safety.

Some common challenges and caregiving needs associated with low blood pressure are as follows:

What is the Prognosis for Low Blood Pressure?

The prognosis for low blood pressure depends mainly on its cause, severity and response to treatment. People who naturally have low blood pressure without symptoms may not need treatment and can lead a normal life. Temporary hypotension caused by dehydration may improve after the underlying fluid loss is corrected.

In contrast, hypotension associated with heart disease, severe infection, significant blood loss, autonomic disorders, or other chronic conditions may require ongoing medical management.

Orthostatic hypotension can increase the risk of falls and fainting, particularly among older adults. Identifying medicines, medical conditions, and other factors contributing to the blood pressure drop can help reduce these risks.

A sudden fall in blood pressure accompanied by confusion, loss of consciousness, cold and clammy skin, or rapid breathing can indicate a serious medical emergency and requires prompt treatment.

How to Prevent Low Blood Pressure?

Low blood pressure cannot always be prevented, particularly when it is caused by an underlying medical condition or certain medicines. However, some measures may help reduce the risk of low blood pressure, including:

• Drink enough fluids to prevent dehydration, especially during hot weather, illness or physical activity.

• Eat regular, balanced meals and avoid prolonged periods without food.

• Rise slowly from a lying or sitting position to reduce the risk of a sudden drop in blood pressure.

• Avoid excessive alcohol consumption, as it can contribute to dehydration and low blood pressure.

• Take medicines only as prescribed and discuss any episodes of low blood pressure with a healthcare provider.

=

• Manage underlying health conditions and attend regular medical check-ups when advised.

Low Blood Pressure Treatment Cost in India

The treatment cost for low blood pressure in India depends on the underlying cause. For example, a person with mild dehydration may need only a doctor consultation and fluid replacement, while someone with recurrent orthostatic symptoms may require blood tests, an ECG, a specialist assessment, or a tilt table test. Severe hypotension caused by infection, blood loss, or a heart condition may require emergency or in-patient treatment.

The table below provides the approximate treatment costs for low blood pressure:

Note: The above-mentioned costs are estimates. Actual costs vary significantly between hospitals, cities and depending on the treatment.

Does Health Insurance Cover Low Blood Pressure in India?

Yes. In India, health insurance covers medically necessary treatment for low blood pressure. They usually cover:

• In-patient hospitalisation costs for treating a serious underlying cause of hypotension

• Diagnostic tests and investigations performed during hospital stay

• Doctor and specialist consultation charges during covered hospitalisation

• Medicines, procedures and supportive treatment provided during hospitalisation

• Pre- and post-hospitalisation medical expenses for the period specified in the policy

Low blood pressure itself does not always require hospitalisation. Therefore, routine outpatient consultations, medicines or treatment for occasional mild hypotension will be covered only if the policy comes with an OPD cover.

An initial waiting period of 30 days may apply before a claim can be raised. Policyholders must check the policy documents to know the coverage and terms & conditions of the policy.

How Much Health Insurance Coverage is Needed for Low Blood Pressure Treatment?

The financial impact of low blood pressure depends largely on its underlying cause and the treatment required. Mild cases may need only a doctor consultation and basic tests, while hypotension caused by heart conditions, severe infection, blood loss, or other serious conditions may require hospitalisation and more extensive care.

Besides, the cost of treatment in India depends on the hospital, city, diagnostic tests, medicines, duration of treatment and the condition causing the low blood pressure.

Hence, for people with no major underlying health condition, a health insurance cover of around ₹5 lakh to ₹10 lakh can provide basic financial protection against treatment and hospitalisation expenses resulting from low blood pressure. However, people with existing heart, kidney, neurological, or endocrine conditions, or those at a higher risk of hospitalisation, must consider a ₹10 lakh to ₹20 lakh cover.