bronchitis specialist tests overview

Overview

Bronchitis is when the tubes that carry air to your lungs (called bronchial tubes) become swollen and produce extra mucus. This causes coughing, often with phlegm (thick mucus), and makes it harder to breathe. There are two main types: acute bronchitis, which usually gets better on its own, and chronic bronchitis, which is a long-term condition that needs ongoing care.

Yes, bronchitis is very common. Most people have acute bronchitis at least once in their life. Chronic bronchitis affects millions worldwide, especially older adults and smokers.

Anyone can get acute bronchitis, but it is more common in children under 5 and during winter months. Chronic bronchitis mainly affects adults over 40 who smoke or have a history of smoking, as well as people exposed to lung irritants like dust or chemical fumes.

Symptoms

Common symptoms

• A cough that brings up clear, white, yellow, or green mucus (phlegm)
• Shortness of breath, especially during activity
• Wheezing (a whistling sound when you breathe)
• Chest tightness or discomfort
• Fatigue and feeling tired
• Low fever and chills (more common in acute bronchitis)

Symptoms in children

• A cough that may be dry or produce mucus
• Runny nose and congestion
• Fever (temperature over 38°C / 100.4°F)
• Irritability and trouble feeding or sleeping
• Wheezing or fast breathing

Symptoms in older adults

• Increased confusion or drowsiness (can be a sign of low oxygen)
• Cough that may be weak or dry because of age-related muscle loss
• Breathlessness that gets worse quickly
• Chest tightness that limits activity
• More frequent exacerbations (flare-ups) of chronic bronchitis

Causes

Main causes

• Viral infections (same viruses that cause colds and flu) – the most common cause of acute bronchitis
• Bacterial infections (less common)
• Smoking or exposure to secondhand smoke – main cause of chronic bronchitis
• Inhaling lung irritants over time, such as air pollution, dust, chemical fumes, or allergens

Risk factors

• Smoking or living with someone who smokes
• Weakened immune system (due to illness or medications)
• Being around lung irritants at work (e.g., coal mining, grain dust, textile fibers)
• Chronic conditions like asthma, COPD, or GERD (acid reflux)
• Age – very young children and older adults are more at risk for complications

When to see a doctor

See a doctor urgently if:

• You have difficulty breathing that does not improve with rest
• You cough up blood (more than a few streaks)
• You have chest pain, especially when coughing or taking deep breaths
• Your lips or fingertips look blue or gray
• You feel confused or very drowsy

Book a routine appointment if:

• Your cough lasts longer than 3 weeks
• You keep getting bronchitis episodes (several times a year)
• You have underlying lung or heart conditions and symptoms worsen
• You are concerned about symptoms affecting your daily life

Diagnosis

Your doctor will start by asking about your symptoms, medical history, and whether you smoke. They will listen to your lungs with a stethoscope to check for wheezing or crackling sounds. Based on that, they may recommend tests to confirm the diagnosis or rule out other conditions.

Tests that may be done

• Chest X-ray – to check for pneumonia or other lung problems.
• Sputum (mucus) culture – a sample of your phlegm is sent to a lab to see if bacteria are causing the infection.
• Blood tests – a complete blood count can show signs of infection. An arterial blood gas test measures oxygen and carbon dioxide levels.
• Pulse oximetry – a small clip on your finger measures how much oxygen is in your blood.
• Pulmonary function tests (PFTs) – you breathe into a machine to measure how well your lungs work. These are often done for chronic bronchitis.
• CT scan of the chest – more detailed than X-ray, used if the doctor suspects other issues.
• Bronchoscopy – a thin, flexible tube with a camera is passed into your airways to look inside. This is rare and only used in complex cases.

What to expect at your appointment

Most tests are quick and painless. For sputum culture, you will be asked to cough up phlegm into a cup. Blood tests involve a needle prick. Pulmonary function tests require you to blow into a tube several times. Your doctor will explain each test and what the results mean. Usually, you get results within a few days.

Treatment

Treatment depends on whether you have acute or chronic bronchitis. Acute bronchitis usually gets better on its own with rest, fluids, and time. Chronic bronchitis is managed with lifestyle changes and treatments to help you breathe easier and prevent flare-ups.

Self-care at home

• Get plenty of rest to help your body fight the infection.
• Drink lots of fluids (water, warm tea) to thin mucus and keep hydrated.
• Use a humidifier or breathe in steam from a bowl of hot water to soothe airways.
• Avoid smoking and secondhand smoke.
• Honey in warm water can help soothe a sore throat and cough (do not give honey to infants under 1 year).

Medical treatments

Your doctor may suggest over-the-counter remedies to relieve fever, pain, or cough. For bacterial infections, they may prescribe antibiotics – but antibiotics do not work for viral bronchitis. For chronic bronchitis, doctors often recommend inhaled bronchodilators to open airways, and sometimes pulmonary rehabilitation (a programme of exercise and education). Always follow your doctor's advice; do not take any prescription medication without their guidance.

When is surgery considered?

Surgery is very rarely needed for bronchitis. In severe chronic bronchitis, a lung volume reduction procedure may be considered, but this is only for a small number of people and requires specialist review.

Living with this condition

Living with chronic bronchitis means taking care of your lungs every day. Avoid triggers like smoke, pollution, and strong smells. Keep up with your medications and breathing techniques. Stay active as much as you can, and rest when you need to.

Lifestyle tips

• Quit smoking if you smoke – this is the most important step.
• Get your flu vaccine every year and ask about the pneumonia vaccine.
• Avoid close contact with people who have colds or flu.
• Wash your hands often to prevent infections.

Diet and exercise

Eat a balanced diet with plenty of fruits, vegetables, and whole grains to support your immune system. Gentle exercise, like walking or light stretching, can help keep your lungs strong. If you feel breathless, try breathing exercises like pursed-lip breathing. Talk to your doctor before starting a new exercise programme.

Mental health and emotional wellbeing

Living with a long-term lung condition can be stressful and may cause anxiety or depression. It is common to feel frustrated or worried. If you notice mood changes, talk to your doctor or a mental health professional. You are not alone.

Prevention

Acute bronchitis cannot always be prevented, but you can lower your risk by washing hands, avoiding sick people, and not smoking. For chronic bronchitis, preventing it starts with quitting smoking and avoiding lung irritants. Getting vaccinated against the flu and pneumonia also helps.

Vaccines

The annual flu vaccine is recommended for everyone, especially people with chronic lung conditions. The pneumonia vaccine (pneumococcal vaccine) is also advised for adults over 65 and those with health conditions – check with your doctor.

Screening programmes

There is no routine screening for bronchitis. However, if you have a chronic cough or are at high risk (e.g., long-term smoker), your doctor may suggest lung function tests to catch problems early.

Complications

If left untreated

• Pneumonia – infection that spreads into the lungs' air sacs
• Respiratory failure – when lungs cannot get enough oxygen into the blood
• Worsening of chronic bronchitis, leading to more frequent and severe flare-ups
• Heart strain – chronic lung disease can put extra work on the heart

Long-term outlook

For acute bronchitis, most people recover fully within a few weeks with home care. Chronic bronchitis is a long-term condition, but with proper treatment and lifestyle changes, many people manage their symptoms well and maintain a good quality of life. Staying active, quitting smoking, and following your doctor's plan can make a big difference.

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