Lung Health in Children: A Parent's Complete Guide to Warning Signs, Common Conditions & When to Act
A child who wheezes, coughs through the night, or gets chest infection after chest infection is not simply unlucky. A pulmonologist explains what these patterns mean, which conditions parents must know about, and when a symptom that seems minor is actually a signal that demands urgent attention.
There is no anxiety quite like watching your child struggle to breathe. Whether it is a baby breathing rapidly with each feeding, a toddler whose chest pulls inward with every breath, or a school-age child waking at night with a frightening wheeze — the instinct to help, and the fear of not knowing how, is one of the most intense experiences of parenthood.
In my pulmonology clinic, I see children brought in by parents who have been waiting — sometimes for months, sometimes for years — for someone to take their child's symptoms seriously. Children who have been treated for recurrent chest infections without anyone asking why the infections keep coming back. Children whose nighttime cough has been attributed to allergies, to dust, to everything except the actual diagnosis. Children whose breathlessness has been normalised as shyness about exercise, or dismissed as attention-seeking.
This article is for those parents. It covers the most important respiratory conditions affecting children in Pakistan, the warning signs that should never be normalised, the symptoms that constitute an emergency, and the practical steps parents can take to protect their child's lung health from infancy through adolescence.
How Children's Lungs Are Different — And Why It Matters
A child's respiratory system is not simply a smaller version of an adult's. It differs in fundamental ways that explain why children are more vulnerable to respiratory illness, why they deteriorate faster when unwell, and why early intervention matters so much more in a developing lung than in an adult one.
At birth, a baby's lungs contain only a fraction of the alveoli — the tiny air sacs where oxygen is exchanged — that they will eventually have. The vast majority of alveolar development occurs in the first two to three years of life, with continued growth and maturation through adolescence. This means that environmental exposures, infections, and inflammatory conditions during early childhood do not simply cause a temporary illness — they can permanently alter the trajectory of lung development, resulting in reduced lung function that persists into adulthood.
A child's airway is also proportionally much narrower than an adult's. A small amount of swelling — from infection, allergy, or irritation — causes a proportionally much greater reduction in airway diameter and airflow than the same swelling would in an adult airway. This is why children develop severe respiratory distress from infections that would cause only mild symptoms in an adult, and why respiratory deterioration in children can be rapid and frightening.
Finally, children — particularly young children — cannot reliably describe their symptoms. They cannot tell you their chest feels tight, or that they feel breathless on exertion, or that their throat itches when they breathe. Parents and clinicians must recognise the physical signs of respiratory distress and interpret behaviour changes as potential respiratory signals.
Warning Signs Every Parent Must Know
Learning to recognise these signs — and understanding which require urgent action versus routine medical attention — is one of the most important things a parent can do for their child's respiratory health.
Breathing rate is the most sensitive early indicator of respiratory distress in children. Normal rates vary by age: under 2 months, normal is below 60 breaths per minute; 2–12 months, below 50; 1–5 years, below 40; over 5 years, below 30. Count your child's breaths for a full minute when they are calm and asleep. Consistently elevated rates warrant medical evaluation.
When a child is working hard to breathe, the skin between the ribs, below the ribcage, above the collarbone, or at the base of the throat pulls inward with each breath — called retractions. This is a sign of significant respiratory distress and requires urgent medical evaluation. It should never be dismissed or waited on.
Cyanosis — a bluish or greyish discolouration of the lips, tongue, or fingertips — indicates critically low blood oxygen levels and is a medical emergency. Call emergency services immediately. Do not wait to see if it improves. This is the most urgent respiratory warning sign in children of any age.
A high-pitched whistling sound during breathing — particularly on exhalation — indicates narrowed airways. In children under two, wheeze most commonly results from viral bronchiolitis. In older children, recurrent or persistent wheeze should always prompt evaluation for asthma. A single episode of wheeze with a cold is common; repeated episodes are not.
A cough that consistently wakes a child at night or is present every morning — particularly a dry cough without obvious cold symptoms — is a classic feature of asthma in children. It is one of the most frequently missed diagnostic clues, often attributed to environmental dust or post-nasal drip without proper evaluation.
Children with undiagnosed exercise-induced asthma often stop running, avoid games, and lag behind peers in physical activity — not out of laziness, but because exertion triggers breathlessness or chest tightness that they do not have the words to describe. A child who consistently avoids exercise should be assessed for exercise-induced bronchoconstriction.
Parents are almost always right when they say something is wrong with their child's breathing. They live with that child every day. They know what is normal and what is not. When a parent tells me their child breathes differently, coughs differently, or tires differently than they used to — I listen. That history, from a parent who knows their child, is the most valuable diagnostic tool I have.
— Dr. Nabila Zaheer, Pulmonologist
The Most Important Respiratory Conditions in Children
Asthma — The Most Common Chronic Lung Disease of Childhood
Asthma is the most prevalent chronic disease of childhood worldwide and is significantly underdiagnosed in Pakistan — particularly in younger children and in girls, whose symptoms are more likely to be attributed to other causes. It affects the airways in the same fundamental way as adult asthma — persistent inflammation, hyperresponsive airways, reversible bronchoconstriction — but presents differently in children and requires an age-appropriate approach to diagnosis and management.
In children under five, diagnosing asthma is particularly challenging because standard spirometry requires patient cooperation that young children cannot reliably provide. Diagnosis in this age group is based on the clinical pattern: recurrent episodes of wheeze, cough, or breathlessness that are triggered by identifiable factors (viral infections, allergen exposure, exercise, cold air), respond to bronchodilator treatment, and occur in a child with a personal or family history of atopic conditions.
In school-age children, spirometry with bronchodilator reversibility becomes possible and provides more objective diagnostic confirmation. Key diagnostic clues in this age group include nighttime cough, exercise-triggered symptoms, symptom improvement with salbutamol inhaler, and a pattern of recurrent episodes rather than a continuous illness.
Childhood asthma that is identified early and managed effectively with appropriate inhaled corticosteroid therapy produces significantly better long-term outcomes than asthma that is managed late or managed with reliever inhalers alone. Every episode of severe, uncontrolled asthma in a child causes airway damage that accumulates over time — making early, consistent control genuinely protective of adult lung function.
Bronchiolitis — The Most Common Serious Infection in Infants
Bronchiolitis is a viral infection of the small airways — the bronchioles — that affects primarily infants and children under two years of age. It is most commonly caused by respiratory syncytial virus (RSV), though other viruses including rhinovirus and adenovirus also cause the condition. In Pakistan, bronchiolitis peaks during the winter months from November through February.
Bronchiolitis begins like an ordinary cold — runny nose, mild fever, cough — but over two to three days progresses to involve the lower airways. The bronchioles become inflamed, fill with mucus, and narrow, causing the characteristic wheeze, rapid breathing, and feeding difficulties of the condition. In healthy, full-term infants the illness is usually self-limiting, resolving over one to two weeks. In premature babies, infants with congenital heart disease, and infants with immune deficiency, bronchiolitis can be severe and life-threatening.
There is no specific antiviral treatment for bronchiolitis. Management is supportive — ensuring adequate hydration and feeding, monitoring breathing and oxygen levels, and providing supplemental oxygen when saturation falls below 90 to 92 percent. Bronchodilators and steroids are not routinely effective and are not recommended. Hospitalisation is indicated when the infant shows signs of respiratory distress, feeding difficulties of more than 50 to 75 percent of normal intake, oxygen saturation below 90 to 92 percent, or parental concern that the infant is deteriorating.
Pneumonia in Children
Pneumonia — infection of the lung parenchyma — is the leading infectious cause of death in children under five globally and remains a significant cause of childhood mortality in Pakistan. The organisms responsible vary by age: in newborns, group B streptococcus and gram-negative bacteria predominate; in infants and toddlers, respiratory syncytial virus, Streptococcus pneumoniae, and Haemophilus influenzae are most common; in school-age children, Mycoplasma pneumoniae ("walking pneumonia") becomes increasingly important.
Parents should seek urgent medical attention if a child develops fast breathing with fever, appears unwell beyond what a simple cold would explain, develops chest pain, shows any signs of respiratory distress such as retractions, stops feeding or drinking, becomes unusually drowsy or difficult to rouse, or develops a bluish colour around the lips. Childhood pneumonia is treated with antibiotics in bacterial cases, but determining the causative organism and the appropriate antibiotic requires clinical assessment and sometimes laboratory investigation — self-treatment at home without medical evaluation is not appropriate for suspected pneumonia.
Tuberculosis in Children
TB in children differs importantly from TB in adults and is frequently missed or delayed in diagnosis. Children most commonly acquire TB through close contact with an infectious adult household member — typically a parent, grandparent, or other carer. Because children have less efficient immune containment of the bacteria, they are at higher risk of disseminated disease — including the most dangerous forms such as TB meningitis and miliary TB — than adults exposed to the same source.
TB in children most commonly presents not as pulmonary TB — which is the typical adult presentation — but as TB lymphadenitis (painless swollen lymph nodes, most often in the neck), primary pulmonary TB with hilar lymphadenopathy on chest X-ray, or non-specific features including prolonged fever, weight loss, and failure to thrive. The classic adult presentation of cough with haemoptysis is uncommon in children.
Every child who is a close household contact of an adult with confirmed active pulmonary TB should be screened — regardless of whether they have symptoms. Children under five who are household contacts of a TB patient should be offered isoniazid preventive therapy even if their tests are negative, because the risk of progression to severe disease in this age group is high and the benefit of prevention is substantial.
Allergic Rhinitis in Children
Allergic rhinitis is extremely common in children in Rawalpindi and Islamabad — where both outdoor pollen exposure and indoor allergen loads (house dust mite, cockroach, mould) are high. In children, allergic rhinitis frequently goes undiagnosed because its symptoms — persistent nasal congestion, snoring, mouth breathing, frequent throat clearing, and dark circles under the eyes — are attributed to normal childhood colds rather than recognised as an allergic condition requiring specific management.
Untreated allergic rhinitis in children has consequences beyond nasal discomfort. It disrupts sleep quality, impairs concentration and academic performance, causes recurrent ear infections and hearing difficulties through Eustachian tube dysfunction, and — critically — significantly increases the risk of developing asthma. A child with allergic rhinitis who is also sensitised to house dust mite or pollen is at substantially elevated risk of asthma onset. Treating the rhinitis effectively with nasal corticosteroid sprays and allergen avoidance measures is therefore not just about comfort — it is part of asthma prevention.
Primary Ciliary Dyskinesia (PCD)
PCD is a rare but important genetic condition in which the cilia lining the airways are structurally abnormal and unable to beat effectively. Without functional cilia, mucus cannot be cleared, leading to recurrent sino-pulmonary infections from birth and progressive bronchiectasis over years. PCD is significantly underdiagnosed in Pakistan — many affected children are treated for years for recurrent chest infections without the underlying diagnosis being considered.
Clues that suggest PCD include: recurrent chest infections from early infancy, chronic productive cough from birth, persistent nasal congestion and sinusitis, chronic ear problems and hearing loss, and — in approximately 50 percent of cases — situs inversus (organs on the opposite side from normal, identified on chest X-ray). If a child has recurrent unexplained chest infections from infancy alongside chronic ear and sinus problems, PCD should be specifically considered and specialist referral arranged.
Protecting Your Child's Lungs: What Parents Can Do
Breast milk contains maternal antibodies, anti-inflammatory factors, and immune-modulating components that reduce the frequency and severity of respiratory infections in infancy. Exclusively breastfed infants have significantly lower rates of bronchiolitis, pneumonia, and wheezing illness in the first year of life compared to formula-fed infants. Where breastfeeding is possible and the mother wishes to breastfeed, it is the single most powerful protective intervention available for infant respiratory health in the first six months of life.
Pakistan's Expanded Programme on Immunisation (EPI) includes vaccines that directly protect against the most dangerous causes of childhood respiratory illness: the BCG vaccine against tuberculosis, the pneumococcal conjugate vaccine (PCV) against Streptococcus pneumoniae — the leading bacterial cause of childhood pneumonia — and the Haemophilus influenzae type b (Hib) vaccine against another major cause of pneumonia and meningitis. These vaccines save lives and protect lung health. Delaying or skipping vaccinations leaves children unnecessarily vulnerable during the most critical period of lung development. Annual influenza vaccination for children over six months is also strongly recommended, particularly for those with asthma, heart disease, or other chronic conditions.
There is no safe level of secondhand smoke exposure for children. Children who grow up in homes where adults smoke have significantly higher rates of asthma, bronchiolitis, pneumonia, ear infections, and sudden infant death syndrome. The harmful chemicals in cigarette smoke penetrate deeply into a child's airways — which are proportionally smaller and more vulnerable — and remain on surfaces and fabrics (thirdhand smoke) even after the cigarette is extinguished. If you smoke and have children, smoking outside the home reduces but does not eliminate their exposure. The most protective action is complete cessation. Shisha smoked inside the home is equally harmful to children present in that environment.
House dust mite sensitisation — one of the most common and most important triggers of childhood asthma and allergic rhinitis in Pakistan — can be significantly reduced through practical measures: encasing mattresses, pillows, and duvets in allergen-proof covers; washing bedding weekly at 60°C; reducing soft furnishings and carpeting in the child's bedroom; maintaining indoor humidity below 50 percent; and regular vacuuming with a HEPA-filter vacuum. Cockroach allergen — a significant trigger in urban Pakistani homes — is reduced by rigorous food storage, sealing cracks and crevices, and professional pest control. These measures will not eliminate sensitisation in already-sensitised children, but they reduce the allergen load that drives symptoms and exacerbations.
Children are disproportionately harmed by air pollution — they breathe more air relative to their body weight, spend more time outdoors, and have developing lungs that are more sensitive to pollutant damage. During high-pollution days in Rawalpindi and Islamabad — which occur frequently from October through January — keep children indoors with windows closed during peak pollution hours, use HEPA air purifiers in bedrooms and playrooms, avoid outdoor play near busy roads, and ensure children with asthma or allergic rhinitis are on their prescribed daily controller medication rather than relying on reliever inhalers alone.
If an adult in your household — or a frequent visitor — is diagnosed with active pulmonary TB, every child in regular contact must be screened. Do not assume a child is protected because they seem well or because they received the BCG vaccine. BCG prevents the most severe forms of TB in children but does not reliably prevent pulmonary TB. A chest X-ray, tuberculin skin test, and clinical assessment by a physician experienced in paediatric TB should be arranged for all child contacts within weeks of the adult diagnosis — not months. Preventive therapy for high-risk contacts, particularly those under five, is straightforward and highly effective when started early.
A child who has more than two to three lower respiratory tract infections per year, who wheezes recurrently, who coughs every night, or whose breathlessness limits physical activity deserves a proper respiratory evaluation — not reassurance that "children get a lot of infections" or that they will "grow out of it." Early diagnosis of asthma, PCD, immune deficiency, or other treatable conditions can prevent the cumulative airway damage that results from years of uncontrolled disease. A pulmonology consultation — including spirometry in cooperative children over five, allergy testing, and chest imaging where indicated — provides the answers that allow specific, effective management to begin.
Emergency Signs — When to Act Immediately
Every parent should know the signs that require immediate emergency medical care — not a next-day appointment, not a call to a relative, but immediate action. Take your child to the nearest emergency department or call for an ambulance if you observe any of the following:
Respiratory Emergency Warning Signs in Children
- Blue or grey colour around the lips, tongue, or fingertips — cyanosis indicates critically low blood oxygen. This is the most urgent respiratory emergency sign in children of any age.
- Very fast breathing with obvious effort — particularly if the nostrils are flaring, the skin is pulling in between the ribs or at the base of the throat, or the child is using their shoulders to breathe.
- A child who cannot speak, cry, or make sounds normally due to breathing difficulty — severe respiratory distress prevents normal vocalisation.
- A baby who stops feeding because of breathlessness — infants who cannot complete feeds due to rapid breathing or breathlessness are at high risk of rapid deterioration and require urgent assessment.
- A child who becomes drowsy, floppy, or difficult to wake during a respiratory illness — altered consciousness during a breathing illness indicates severe illness requiring emergency care.
- A child with known asthma whose reliever inhaler is not working — if multiple doses of salbutamol are not producing improvement in a child having an asthma attack, this is a medical emergency.
- Stridor — a harsh, high-pitched sound heard on inspiration (breathing in) rather than expiration. Stridor indicates upper airway obstruction and always requires urgent evaluation, as causes include croup, epiglottitis, and foreign body inhalation.
When to See a Paediatric Pulmonologist
While a general practitioner or paediatrician is the appropriate first point of contact for most childhood respiratory illnesses, certain patterns of symptoms — or failures of response to standard treatment — indicate the need for specialist pulmonology assessment.
Seek a pulmonology consultation for your child if they experience any of the following: recurrent wheeze on three or more occasions regardless of age; a diagnosis of asthma in a child whose symptoms are not responding adequately to prescribed treatment; recurrent lower respiratory tract infections — more than two to three per year; a chronic daily cough lasting more than four weeks; breathlessness that limits exercise or play; recurrent pneumonia — more than one episode, which always requires investigation for an underlying cause; a chest X-ray showing persistent or recurrent abnormalities; suspected or confirmed TB contact requiring specialist management; or any concern about a child's breathing pattern, chest shape, or growth that has not been adequately explained by a general practitioner.
The children who do best — whose asthma is well controlled, whose recurrent infections are finally explained, whose lungs develop as they should — are the ones whose parents trusted their instinct that something was wrong and kept asking until they got a proper answer. You know your child. If their breathing does not seem right to you, it deserves investigation. Please do not let anyone dismiss that concern without giving you a satisfying explanation.
— Dr. Nabila Zaheer, Pulmonologist
Frequently Asked Questions
My two-year-old wheezes every time they get a cold. Does that mean they have asthma?
Not necessarily — though it does require proper evaluation. Viral-induced wheeze is very common in children under three and does not always progress to asthma. However, children who wheeze recurrently — particularly those with a family history of asthma or a personal history of eczema or allergic rhinitis — are at higher risk of developing asthma. The pattern of wheezing, the triggers, the family history, and the response to bronchodilator treatment all inform the clinical assessment. Rather than either dismissing recurrent wheeze or labelling it asthma without proper evaluation, I recommend a specialist assessment so that the appropriate management — and the appropriate level of reassurance — can be provided.
Are steroid inhalers safe for children long term?
Yes — inhaled corticosteroids at prescribed doses are safe for long-term use in children and are the most effective treatment for preventing asthma exacerbations and protecting airway health. The amount of steroid absorbed into the body from an inhaled corticosteroid at standard doses is minimal — far less than a short course of oral steroids, and far less than the systemic effects of repeated asthma exacerbations and infections. The concern about steroid inhalers causing growth problems — a worry many parents raise — applies only to high doses used over many years, and is not a significant concern at standard prescribed doses. Uncontrolled asthma causes far more harm to a child's development and wellbeing than appropriately dosed inhaled corticosteroids do.
My child has had pneumonia twice. Should I be worried?
Yes — recurrent pneumonia in a child always warrants investigation for an underlying cause. A single episode of pneumonia in an otherwise healthy child, resolving completely with treatment, is usually an isolated event. Two or more episodes — particularly if they recur in the same area of the lung — raise the possibility of an underlying predisposing condition: an immune deficiency, an anatomical abnormality such as a congenital lung malformation, primary ciliary dyskinesia, a foreign body in the airway, or an aspirating condition. A referral to a paediatric pulmonologist after a second episode of pneumonia is entirely appropriate and should be requested if not offered.
How do I know if my child's inhaler technique is correct?
Inhaler technique in children is critically important and very frequently incorrect — even when parents and children believe they are using the device properly. Metered dose inhalers (MDIs) in children under eight should always be used with a valved holding chamber (spacer) — using an MDI without a spacer in a young child delivers very little medication to the lungs. For children under three, a face mask attached to the spacer is needed. The child should breathe in slowly and steadily, not forcefully. Ask your pulmonologist, nurse, or pharmacist to observe your child's technique at every visit — watching the technique directly is the only reliable way to identify errors.
At what age can children have allergy testing for respiratory allergies?
Allergy testing — both skin prick testing and specific IgE blood tests — can be performed at any age, including in infancy. In young children who cannot cooperate with skin prick testing, specific IgE blood testing is a reliable alternative. Allergy testing is particularly valuable in children with recurrent wheeze, asthma, or allergic rhinitis because identifying specific allergen sensitivities guides avoidance measures and opens the door to allergen immunotherapy — which in appropriately selected children can modify the allergic disease process and reduce the risk of developing new sensitivities or progressing from rhinitis to asthma.
Your Child's Lungs Are Still Growing. Protect Them Now.
If your child wheezes, coughs through the night, gets repeated chest infections, or struggles to keep up physically — do not wait for them to grow out of it. The window to protect developing lungs is narrow and enormously important. Book a consultation with Dr. Nabila Zaheer at PulmoCare today.
Book an Appointment