Key takeaways
- The first symptom of pulmonary hypertension is almost always breathlessness during effort that never used to tire you. It builds slowly, so it is easy to miss.
- Tiredness, dizziness, palpitations, and chest tightness often follow. Swelling and fainting tend to come later.
- The early signs copy common problems like asthma, anaemia, or simply being unfit, which is a main reason the condition is found late.
- A loud second heart sound and swelling in the legs or tummy are signs a doctor looks for.
- Some groups are at higher risk, including people with heart, lung, or connective tissue disease.
- New or worsening breathlessness with no clear cause is worth a heart check, including an echocardiogram.
If you get breathless climbing stairs that you managed easily a year ago, it is natural to blame age, weight, or a busy life. Often that is all it is. But sometimes breathlessness that keeps creeping up is an early sign of a problem in the heart and lungs.
This guide explains the pulmonary hypertension symptoms adults notice, how they change over time, and when breathlessness is worth a closer look. If you already have a diagnosis, you can read about your pulmonary hypertension treatment options next.
What is pulmonary hypertension, and why does it cause symptoms?
Pulmonary hypertension is high blood pressure in the arteries that carry blood from the heart to the lungs. The right side of the heart has to pump harder against that pressure, and over time it tires. Most symptoms come from this strain, and they usually show up during activity first.
In a healthy body, the lung arteries are soft and open, so blood flows through them easily. In pulmonary hypertension, these arteries become narrow or stiff. The right side of the heart then has to push much harder to move blood through the lungs.
During activity, a healthy heart lifts its output to meet demand. In pulmonary hypertension, that lift is limited. So you feel breathless and tired sooner than you expect. This is why early pulmonary hypertension shortness of breath shows up during effort, like stairs or a brisk walk, long before it appears at rest.
Pulmonary hypertension can affect adults and children. The causes and signs differ between them, which we cover in our guide to pulmonary hypertension in children. This article focuses on adults.
What are the early signs of pulmonary hypertension in adults?
The earliest sign of pulmonary hypertension in adults is breathlessness during activity that used to feel easy. Fatigue, dizziness, and a racing heartbeat often come next. These early signs are mild and easy to explain away, which is why many people wait months before seeing a doctor.
According to the 2022 ESC/ERS guidelines, the cardinal symptom is breathlessness on steadily smaller amounts of effort. The early signs of pulmonary hypertension usually appear in this order:
- Breathlessness when you climb stairs, walk uphill, or carry shopping
- Unusual tiredness that rest does not fully fix
- Dizziness or feeling light-headed, especially on exertion
- A racing or pounding heartbeat (palpitations)
- Mild chest tightness during activity
- Needing to stop and rest more often than before
No single sign proves you have pulmonary hypertension. Each one has many causes. But when two or more appear together and slowly get worse, it is worth asking your doctor to look further.
How do symptoms change as it progresses?
Pulmonary hypertension symptoms worsen in stages. Early on, you only notice them during effort. In the moderate stage, light activity brings them on. In the advanced stage, you can feel breathless even at rest, often with swelling and fainting spells.
The table below shows how the picture usually changes. Not everyone moves through it at the same speed, and the right treatment can slow it down.
| Stage | What you feel | Daily impact |
|---|---|---|
| Early | Breathless on stairs or brisk walks, mild tiredness, occasional dizziness | You still manage most tasks, but you slow down |
| Moderate | Breathless on light activity, clear fatigue, palpitations, mild ankle swelling | Everyday chores like cooking or bathing feel harder |
| Advanced | Breathless at rest, fainting spells, chest pain, swelling in the legs and tummy, bluish lips | Simple movement is a struggle, and you need regular help |
Two symptoms deserve a special mention. Pulmonary hypertension chest pain usually appears during activity and feels like pressure rather than a sharp stab. It can come from the strained right heart, or from a widened lung artery pressing on nearby structures. Fainting, or near-fainting, on mild effort is a more serious sign and should always be checked quickly.
Some people also notice breathlessness when they bend forward, for example to tie a shoelace. Doctors call this bendopnoea, and it can be an early clue.
What are the signs of right heart failure in pulmonary hypertension?
As pulmonary hypertension advances, the right side of the heart can start to fail. The clearest signs are swelling in the ankles, legs, and tummy, raised veins in the neck, a swollen or tender tummy, and loss of appetite. These point to a heart that is struggling to keep up.
When the right heart cannot pump well, blood backs up into the body. Fluid then collects where gravity pulls it. The link between swelling and pulmonary hypertension is important, because sudden swelling is often the sign that tips a late diagnosis.
Signs of right heart strain include:
- Swelling in both ankles and legs (oedema)
- A swollen tummy from fluid build-up (ascites)
- Fullness or discomfort under the right ribs, where the liver sits
- Raised, visible veins in the neck
- Loss of appetite or feeling full quickly
- Sudden weight gain over a few days, which is fluid rather than fat
A quick rise in weight with new swelling should be reported to your doctor without delay. It usually means fluid is building up faster than the body can clear it.
How is the WHO functional class used to grade symptoms?
Doctors use the WHO functional class to describe how much pulmonary hypertension limits daily life. It runs from Class I, with no limit, to Class IV, with symptoms even at rest. The class helps guide treatment and shows whether you are improving.
This simple grading is used at almost every specialist visit. It is based on the 2022 ESC/ERS guidelines.
| Class | What it means | Typical activity limit |
|---|---|---|
| Class I | No limit on physical activity | Ordinary activity causes no breathlessness, tiredness, chest pain, or dizziness |
| Class II | Slight limit | Comfortable at rest, but ordinary activity brings on symptoms |
| Class III | Marked limit | Comfortable at rest, but light activity, less than usual, brings on symptoms |
| Class IV | Severe limit | Breathless or tired even at rest, with signs of right heart strain |
Your class is not fixed. Many patients move from Class III back towards Class II once the right treatment begins. That shift is one of the clearest signs that treatment is working.
How are the symptoms different from asthma or COPD?
Pulmonary hypertension is often mistaken for asthma, COPD, anaemia, or anxiety, because breathlessness and tiredness are shared by all of them. The clue is that pulmonary hypertension breathlessness keeps worsening and does not respond well to inhalers or standard asthma treatment.
Misdiagnosis is common. In a large multinational survey, about 41% of people with pulmonary arterial hypertension were first misdiagnosed, and they saw an average of nearly three doctors before getting the right answer. Breathing tests can add to the confusion, because a mildly abnormal result does not rule pulmonary hypertension in or out.
The table below shows the practical differences a reader can notice.
| Clue | Asthma or COPD | Pulmonary hypertension |
|---|---|---|
| Wheeze | Common | Usually absent |
| Response to inhalers | Often helps | Little or no lasting help |
| Pattern of breathlessness | Can come in attacks, often with triggers | Steady, slowly worsening with effort |
| Fainting on effort | Uncommon | A known warning sign |
| Leg or tummy swelling | Uncommon | Can appear as it advances |
If you are being treated for asthma or a chest problem and you are not improving, it is reasonable to ask for a heart check. This simple step catches cases that are otherwise missed for years.
Why is pulmonary hypertension so often diagnosed late?
Pulmonary hypertension is diagnosed late because its early signs copy far more common conditions, and because it is rare, so doctors rarely suspect it first. Studies show the gap between the first symptom and diagnosis is often more than two years.
Across large international studies, the delay from first symptom to confirmed diagnosis is frequently over two years, and in some groups close to four years, as the DELAY study found. By the time pulmonary hypertension is confirmed, it has usually progressed.
The Indian picture tells the same story. In the PROKERALA registry, the largest study of pulmonary hypertension in Indian adults with over 2,000 patients, around 59% were already in WHO functional class II by the time they were diagnosed. In plain terms, everyday activity was already limiting them. A separate study from eastern India, PULMOEAST, found that most patients were only referred to a specialist once their pulmonary hypertension was already moderate or severe.
The lesson is simple. Breathlessness that is not explained, and not improving, deserves a proper heart and lung assessment rather than another round of the same treatment.
Who is at higher risk of pulmonary hypertension?
Some people face a higher risk and should treat new breathlessness more seriously. These include people with heart or lung disease, those with connective tissue conditions like scleroderma, anyone with a family history of pulmonary hypertension, and people born with heart defects.
Pulmonary hypertension can appear on its own, but it is often linked to another condition. Knowing your risk helps you act sooner.
Heart and lung conditions
Long-standing left heart disease and chronic lung diseases such as COPD are among the most common reasons for raised lung pressure worldwide. If you already live with one of these and your breathlessness changes, mention it to your doctor.
Connective tissue disease
Conditions like scleroderma (systemic sclerosis) and lupus raise the risk of pulmonary arterial hypertension. Pulmonary arterial hypertension affects up to around 15% of people with connective tissue disease, and systemic sclerosis carries the highest risk, as set out in specialist screening recommendations. Because the symptoms are vague, regular screening is advised for people with scleroderma, even before symptoms begin.
Family history and inherited risk
A small number of cases run in families, caused by a gene change. If a close relative has had pulmonary arterial hypertension, tell your doctor, as monitoring may be offered.
Other risk factors
Pulmonary arterial hypertension is more common in women than men. Risk also rises with age in connective tissue disease. A history of certain appetite-suppressant drugs, some other medicines, HIV, liver disease, or a heart defect present from birth can all play a part. People born with a heart defect are a particularly important group in India, which is why early specialist review matters.
Can pulmonary hypertension symptoms come and go?
Early on, symptoms can feel like they come and go. On a rested day you may feel almost normal, while a busy day brings the breathlessness back. This on-and-off pattern is one reason people delay seeing a doctor, because a good day feels reassuring.
As the condition advances, symptoms settle in and stop easing off. If your breathlessness swings from day to day but the bad days are slowly getting worse, that is still a clear reason to get checked. The trend over weeks matters more than any single good day.
When should you see a doctor about breathlessness?
See a doctor if your breathlessness is new, steadily worsening, or not explained by a known cause, especially if it comes with dizziness, chest pressure, fainting, or swelling. Breathlessness after hard exercise is normal. Breathlessness during gentle, everyday effort is not.
Treat these as red flags and book an appointment soon:
- Breathlessness that keeps worsening over weeks with no clear reason
- Fainting or near-fainting during activity
- Chest pain or pressure when you exert yourself
- Swelling in both ankles, legs, or the tummy
- A blue tinge on the lips or fingertips
- Breathlessness treated as asthma that is not getting better
If any of these apply, do not wait for a routine review. You can learn what a specialist assessment involves on the pulmonary hypertension treatment page, or speak to a pulmonary hypertension specialist directly.
What happens after you see a specialist?
The first test is usually an echocardiogram, a painless scan that estimates lung pressure. If it points to pulmonary hypertension, the specialist arranges further tests to confirm it and find the cause. This step-by-step approach avoids both missed cases and wrong labels.
An echocardiogram is quick and safe, and it is the usual starting point. If it suggests raised pressure, the next tests confirm the diagnosis and sort out the cause, which guides treatment. You can read more in our guide to how pulmonary hypertension is diagnosed.
The aim at every step is the same: find out whether you truly have pulmonary hypertension, identify the cause, and start the right treatment early. Catching it earlier gives treatment the best chance to help.
Getting the right answer, sooner
Breathlessness that keeps creeping up is easy to dismiss, and easy to misread. The safest step is a proper assessment rather than months of guessing, because pulmonary hypertension responds far better to treatment when it is caught early.
Dr Prashant Bobhate runs a dedicated pulmonary hypertension clinic at Kokilaben Dhirubhai Ambani Hospital in Andheri West, Mumbai, where adults and children with suspected or confirmed pulmonary hypertension are assessed and managed. Care covers accurate diagnosis, including right heart catheterisation where needed, and long-term treatment planning. If your breathlessness is unexplained or getting worse, book a consultation to find out what is really going on.
References
- 2022 ESC/ERS Guidelines for the diagnosis and treatment of pulmonary hypertension. European Respiratory Journal. https://publications.ersnet.org/content/erj/61/1/2200879
- Small M, et al. The diagnostic journey of pulmonary arterial hypertension patients: results from a multinational real-world survey. Therapeutic Advances in Respiratory Disease, 2024. https://doaj.org/article/69c1d96baf1a4edeae6783910daab407
- Brown LM, et al. Time from symptoms to definitive diagnosis of idiopathic pulmonary arterial hypertension: The DELAY study. Chest, 2011. https://pubmed.ncbi.nlm.nih.gov/23662179
- PROKERALA registry. Clinical characteristics and practice patterns of pulmonary hypertension in Indian adults. International Journal of Cardiology, 2018. https://pmc.ncbi.nlm.nih.gov/articles/PMC8891004
- Singhi AK, et al. PULMOEAST: A Comprehensive Analysis of Pulmonary Hypertension in Eastern India. Cureus, 2023. https://pubmed.ncbi.nlm.nih.gov/38205444/
- Khanna D, et al. Recommendations for Screening and Detection of Connective Tissue Disease-Associated Pulmonary Arterial Hypertension. Arthritis & Rheumatism. https://pmc.ncbi.nlm.nih.gov/articles/PMC3883571