Many people ask:
"How did my clinician know I had a breathing pattern disorder?"
Or perhaps:
"How can they diagnose this if all my tests are normal?"
These are sensible questions.
Unlike asthma or pneumonia, there is no single test that can diagnose a breathing pattern disorder. Instead, clinicians build up a picture by combining information from your symptoms, your breathing pattern, your examination and, when appropriate, specialised investigations.
Think of it as putting together the pieces of a jigsaw rather than looking for one positive test. Every person has a slightly different collection of pieces, which is why no two assessments are exactly the same.
There is no single diagnostic test
Researchers agree that there is currently no gold-standard test for diagnosing a breathing pattern disorder.
This is because breathing is influenced by many different systems, including the lungs, muscles, nervous system and brain. No single investigation can assess all of these together.
Instead, clinicians look for a combination of findings that suggest your breathing pattern is contributing to your symptoms.
The diagnosis is based on clinical reasoning, not one abnormal result.
It starts with listening to your story
The most important part of the assessment is often the conversation.
Your clinician will want to understand:
- when your symptoms started
- how your breathing feels
- what makes it better or worse
- how it affects everyday life
- previous illnesses or respiratory conditions
- how your symptoms have changed over time
The words people use can also be helpful.
Many people with a breathing pattern disorder describe:
- feeling unable to take a satisfying breath
- air hunger
- chest tightness
- frequent sighing
- breathing that feels difficult despite normal oxygen levels
Your story provides important clues that no machine can measure.
Watching you breathe
A great deal can be learnt simply by observing breathing.
Your clinician may watch how you breathe while sitting quietly, talking, standing or walking.
They may look at:
- the rhythm of your breathing
- how quickly you breathe
- how your chest and abdomen move
- whether your breathing mainly comes from the upper chest
- whether you frequently sigh or yawn
- whether you appear to use the muscles in your neck and shoulders to breathe
- how your breathing changes during conversation or gentle activity
No single observation confirms a breathing pattern disorder.
Instead, clinicians look for several features that fit together.
Looking for patterns rather than one sign
This is one of the most important parts of the assessment.
There is no single breathing pattern that automatically means someone has a breathing pattern disorder.
Likewise, there is no questionnaire score or examination finding that provides a diagnosis on its own.
Instead, clinicians combine information from:
- your symptoms
- your medical history
- their observations
- your examination
- any investigations that have already been performed
Each piece of information adds to the overall picture.
Why can my spirometry be normal?
This is one of the questions people ask most often.
Spirometry measures how well air moves in and out of your lungs. It is excellent at identifying problems such as asthma, COPD and some other lung diseases.
A breathing pattern disorder is different.
It affects how breathing is organised and controlled, rather than the size of your lungs or the openness of your airways.
This means spirometry may be completely normal even though breathing feels uncomfortable or difficult.
Key message
This does not mean the test is unhelpful. In fact, a normal spirometry result can be an important piece of information because it helps your clinician understand what is—and is not—contributing to your breathlessness.
The same applies to many other routine investigations.
A normal chest X-ray does not assess how breathing is coordinated.
Normal oxygen levels do not explain why breathing feels unsatisfying.
Routine blood tests do not measure breathing patterns.
These investigations remain extremely important because they help identify other causes of breathlessness. They simply answer different questions.
Physical examination
Your clinician will usually carry out a physical examination.
This may include:
- listening to your chest
- assessing how your chest and abdomen move during breathing
- looking at posture
- assessing muscle tension around the neck and shoulders
- observing your breathing during simple movements
The examination helps identify positive features that may suggest your breathing pattern is contributing to your symptoms.
Questionnaires
Several questionnaires have been developed to support assessment.
These may explore:
- breathlessness
- breathing-related symptoms
- the impact of symptoms on daily life
- symptoms associated with hyperventilation
- anxiety or other factors that may influence breathing
Questionnaires do not diagnose a breathing pattern disorder.
Instead, they help clinicians understand your symptoms more fully and monitor progress over time.
Cardiopulmonary Exercise Testing (CPET)
Some people require more detailed assessment.
Cardiopulmonary Exercise Testing (CPET) is one of the most comprehensive physiological assessments available for investigating unexplained breathlessness.
During CPET, clinicians can observe how the lungs, heart and muscles work together as exercise becomes more demanding. For some people, this provides valuable information about breathing patterns that may not be apparent while sitting quietly.
Not everyone with a breathing pattern disorder needs CPET, but it can be particularly helpful when the diagnosis remains uncertain or when several possible causes of breathlessness need to be considered.
Making sure nothing important is missed
One of the clinician's responsibilities is to ensure there is not another condition that better explains your symptoms.
This may involve investigations such as:
- spirometry
- blood tests
- chest imaging
- heart investigations
- exercise testing
Sometimes another diagnosis is found.
Sometimes a breathing pattern disorder exists alongside another condition, such as asthma, COPD or Long COVID.
This is why assessment focuses on understanding the whole person rather than looking for one explanation alone.
Putting the pieces together
A breathing pattern disorder is rarely diagnosed because of one abnormal test.
Instead, clinicians combine information from many different sources.
They ask:
- Does the patient's story fit?
- Are there positive features when breathing is observed?
- Are there patterns that suggest breathing is contributing to symptoms?
- Have other important conditions been considered?
- Do all the pieces fit together?
Only by considering the whole picture can a confident diagnosis be made.
Why this matters
Many people worry that normal investigations mean their symptoms are "not real."
They do not.
Routine tests are designed to detect structural disease affecting the lungs, heart or other organs.
A breathing pattern disorder is different.
It reflects how breathing is functioning, not simply what the lungs look like.
Understanding this difference often helps explain why symptoms can feel very real despite reassuring test results.
For many people, finally understanding how the diagnosis is made is reassuring. It provides an explanation for symptoms that may have been confusing for a long time and helps guide the next step—developing a plan for recovery.
Key messages
- There is currently no single test that diagnoses a breathing pattern disorder.
- The patient's story is one of the most important parts of the assessment.
- Clinicians observe breathing at rest and during movement, looking for recurring patterns rather than one abnormal sign.
- Questionnaires and breathing assessments support the diagnosis but do not confirm it on their own.
- Routine tests such as spirometry, chest X-rays and oxygen measurements may be normal because they assess different aspects of respiratory health.
- CPET can provide additional information in more complex cases of unexplained breathlessness.
- A diagnosis is made by combining information from your history, examination and investigations while ensuring another important condition has not been missed.
Remember: If you develop new, severe or rapidly worsening breathlessness, chest pain, coughing up blood, or feel faint or unwell, seek urgent medical assessment.