Main
- Hypotension — a persistent drop in blood pressure below the usual norm: it can be physiological or symptomatic, against the background of other conditions.
- Manifestations: weakness, dizziness when standing up, drowsiness, fog and darkening before the eyes, nausea, fainting.
- Causes: dehydration, taking medications, endocrine disorders, heart disease, infections, prolonged bed rest.
- Diagnosis: measuring blood pressure lying down and standing, electrocardiography, blood tests, echocardiography, 24-hour blood pressure monitoring.
- An ambulance is called urgently for a sharp drop in blood pressure, fainting, confusion or chest pain.
What is hypotension
Hypotension is a condition in which blood pressure stays lower than usual for a particular person. It is important to understand why this happens, because low readings are sometimes caused by other diseases.
What happens in the body
Blood pressure reflects the force with which blood presses on the walls of blood vessels as it moves through the body. When it drops below a person's usual level, the blood supply to some organs may become insufficient. The brain reacts to this most noticeably, so weakness, lethargy and dizziness appear. In some people this condition is congenital and does not prevent them from living a full life, remaining their personal norm. In others, blood pressure falls against a background of dehydration, infection or disorders in the functioning of internal organs. The body then tries to maintain balance by speeding up heart contractions and narrowing the lumen of blood vessels. If a person notices that the condition recurs, it is reasonable not to attribute it to fatigue, but to discuss it with a doctor.
What causes it to develop
- Dehydration: loss of fluid in the heat, insufficient drinking or a digestive disorder reduces blood volume, and blood pressure falls.
- Taking certain medicines: some remedies affect vascular tone and heart function, so any changes should be reported to a doctor.
- Endocrine disorders: disruptions in the functioning of the endocrine glands change the hormonal background, and with it the regulation of vascular tone.
- Heart diseases: when its function is impaired, blood moves through the vessels more weakly, which affects blood pressure readings.
- Infections: during an illness the body spends its strength on fighting, and blood pressure often falls to unusual values.
- Prolonged bed rest: without movement the vessels lose their fitness, so after lying down for a long time a person may feel shattered.
Who encounters this more often
A tendency to low blood pressure is more common in young people with an asthenic build and in adolescents during a period of active growth. In women this condition is observed more often than in men, especially on days of hormonal changes. People whose work involves prolonged standing or a sedentary position without movement are also at risk. With age the picture changes: in the elderly blood pressure is more often elevated, but sharp drops on standing up occur precisely in them. The general background also matters — lack of sleep, stuffiness, insufficient fluid and past infections weaken the body. Even in one person the readings may differ in the morning and in the evening, so a single figure says little. If weakness and dizziness recur, it is worth discussing this with a doctor, rather than choosing a regimen for yourself on your own.
What symptoms can occur?
Hypotension is noticed by how you feel, not by the blood pressure monitor readings alone. Some people cope with low blood pressure easily, while others complain of weakness and dizziness.
How it is noticed at the very beginning
At the beginning, hypotension manifests itself in that a person tolerates their usual exertion worse and tires more quickly by the evening. Getting out of bed may be accompanied by dizziness, and a sudden bend — by a brief blackout in the eyes for a few seconds. Many explain this state as lack of sleep, stuffiness in the room or ordinary tiredness after the working week. The weakness lasts longer than usual and does not go away after rest, and a fog before the eyes joins in. Nausea unrelated to food and fainting when standing up already indicate that the cause is not overwork. If such episodes recur, they should be written down and shown to the doctor at the appointment. This will help distinguish a random drop in blood pressure from a condition that requires monitoring.
Symptoms that occur most often
- Dizziness when standing up: occurs at the moment of getting up from bed or from a chair and indicates that the blood pressure does not manage to adjust to the change in body position.
- Weakness and increased fatigue: usual work is harder than before, and rest does not restore the usual alertness.
- Fog before the eyes: vision briefly loses clarity, and this makes it difficult to read, work at a screen and move about.
- Blackout in the eyes: the image goes dark for seconds, which is dangerous when walking on stairs or outdoors.
- Nausea: an unpleasant sensation in the abdomen appears without poisoning and unrelated to food intake.
- Fainting: a brief loss of consciousness — the most noticeable symptom, with which a visit to the doctor should not be postponed.
When to seek urgent help
Examinations and tests
Tests for hypotension are needed to understand its cause, not just to record low numbers. The doctor starts with simple and accessible methods, and prescribes more complex ones according to indications.
How the examination begins
Diagnosis begins with measuring blood pressure and asking about complaints, and this is not a formality but the basis for all further steps. The doctor measures blood pressure lying down and standing, because the difference between these values says a lot about the state of the blood vessels. Asking about complaints helps to understand exactly when weakness, dizziness or darkening before the eyes occurs. Electrocardiography shows how the heart works and whether there are rhythm disturbances that affect blood pressure. Blood tests help to rule out anaemia, metabolic disorders and other conditions that produce a similar picture. Cardiac ultrasound assesses the structure of the heart and its contractile ability, which is important in persistent hypotension. Twenty-four-hour blood pressure monitoring records its fluctuations throughout the day, including periods of sleep and exertion. Write down when and under what circumstances you feel unwell, so that the appointment is focused.
What is prescribed and what it shows
What to prepare for the appointment
- Blood pressure diary: records of home measurements with the date, time and how you felt help the doctor to see patterns that are not noticeable at a single appointment.
- List of complaints: briefly describe when weakness or dizziness occurs, what precedes it and how long it lasts, so that nothing is forgotten in the conversation.
- Previous results: take the available discharge summaries, films and examination reports, even those done long ago, because they allow the picture to be compared over time.
- List of medications taken: write down everything you take regularly or from time to time, including what seems insignificant, since it affects blood pressure.
- Questions for the doctor: formulate in advance what exactly is troubling you and what is unclear, so that the appointment provides answers rather than leaving new doubts.
Which doctor should I see?
For persistently low blood pressure and related complaints, care is provided by a cardiologist, and if such a specialist is not available nearby, the initial appointment is conducted by a general practitioner. This section explains what happens at the first consultation and what components make up the care.
Which specialist manages this condition
A cardiologist deals with a condition in which blood pressure remains below the usual level and is accompanied by weakness or dizziness. If there is no cardiologist at the polyclinic, you can book an initial appointment with a general practitioner at your place of residence. The general practitioner clarifies the complaints, measures blood pressure at rest and when changing body position, and collects information about past illnesses and medications being taken. They also assess whether the hypotension is related to another condition or to taking medications prescribed for another reason. If a cardiac cause is suspected, the general practitioner refers the patient to a cardiologist for a more detailed assessment. The cardiologist compares home measurement records with the examination findings and decides whether additional diagnostics are needed. If the cause is not cardiac, other specialists are involved in the follow-up, while management remains with the general practitioner.
What treatment consists of
- Selection of therapy by the doctor: the specialist determines whether intervention is needed at all and selects the areas of care taking into account the cause and the patient's well-being.
- Correction of drinking regimen: sufficient fluid intake maintains blood volume, so the doctor discusses the patient's usual drinking habits.
- Wearing compression garments: pressure on the vessels of the legs reduces blood pooling below and eases the condition when standing up and walking.
- Follow-up with a specialist: regular visits allow tracking changes in well-being and timely adjusting the approach if previous measures are no longer helping.
What depends on the patient themselves
The regularity of follow-up determines how accurately care for low blood pressure can be selected. Records of home measurements with the time and how the patient felt give the doctor a picture that cannot be obtained in a single appointment. If blood pressure is measured only occasionally, patterns remain unnoticed and decisions have to be made blindly. The patient themselves monitors how they cope with heat, stuffiness and prolonged standing, and reports this at the visit. Adherence to the drinking regimen and wearing compression garments work only with consistency, not occasionally. Missing a scheduled visit delays the assessment of the condition and postpones the moment when care becomes more precise. Therefore, it is worth agreeing with the doctor in advance on how often to come in and what records to bring.
What helps prevent an exacerbation?
Prevention of hypotension is built on daily habits that help keep blood pressure at a comfortable level. It is important to avoid dehydration and sudden standing up in order to reduce the risk of an exacerbation.
What is changed in habits
Sufficient fluid intake maintains blood volume and helps avoid dehydration, which often provokes a worsening of well-being. Getting up gradually from a lying position gives the body time to readjust blood flow and reduces the likelihood of dizziness when standing up. Moderate physical activity trains the blood vessels and muscles, maintaining their tone throughout the day. Avoiding prolonged standing reduces blood pooling in the legs and the weakness associated with it. People who drink little water in hot weather or during exertion more often notice a loss of strength and darkening before the eyes. Those who get up abruptly from bed are familiar with the feeling of faintness and flickering before the eyes. It is useful to plan the daily routine in advance so that it has room for both drinking, and movement, and a calm morning.
What should be kept under control
- Drinking regimen: the amount of fluid drunk during the day and signs of dehydration, since their lack directly affects well-being and blood pressure.
- Well-being when standing up: the appearance of dizziness or darkening before the eyes after getting up, which helps to notice intolerance of sudden movements in time.
- Tolerance of exertion: how the body responds to walking, climbing stairs and other activity, in order to select a feasible level of it.
- Duration of standing: how much time has to be spent on one's feet without movement, because prolonged standing increases blood pooling.
- Observation diary: brief notes about well-being and the circumstances of exacerbations, which help the doctor see patterns.
How often to see a doctor
A regular examination by a doctor is needed even when well-being remains good and nothing is troubling. The specialist assesses the general condition, compares complaints with lifestyle and notices changes that a person may not attach importance to. With hypotension it is important to discuss tolerance of exertion, drinking regimen and cases of dizziness when standing up. The doctor will advise which observations should be kept at home and what to pay attention to in everyday life. If exacerbations become more frequent or new symptoms appear, the visit is not postponed until the planned date. Even with a stable condition, periodic examinations help to adjust habits and routine in time. Such monitoring does not replace the prescribed observation, but complements it and makes care timely.
What is worth remembering
Hypotension does not always require treatment, but it is not always safe either: it is important to understand when low blood pressure is a feature of the body and when it is a signal of another condition. A doctor helps to make sense of this, rather than independent attempts to raise blood pressure.
Key takeaways
Hypotension manifests differently in different people, and identical cases are almost unheard of. In one person, low blood pressure is accompanied by weakness and dizziness, while in another it causes no complaints for years. That is precisely why relying on blood pressure monitor readings alone, without taking how you feel into account, is wrong. If hypotension first appeared in adulthood or your usual sensations have changed, this is a reason to undergo an examination rather than attributing everything to fatigue. A sharp drop in blood pressure with fainting, confusion or chest pain requires calling an ambulance without delay. With chronic hypotension, it is sensible to keep a diary of how you feel and your measurements, so that the doctor can see patterns rather than isolated random values. You should not put off a visit to a specialist if your condition interferes with work, study or coping with everyday activities. Hypotension is a reason to monitor yourself carefully, but without panic or hasty decisions.
