pneumonia

Updated: August 2026

Pneumonia is an infection of the lungs that can become serious very quickly, especially in young children.

A child may start with cough, fever or difficulty breathing. In some cases, the illness remains mild. In others, breathing becomes faster, the chest begins to pull inward, oxygen levels fall, or the child becomes too weak to drink.

That is why pneumonia should not be treated as “just another cough.”

WHO describes pneumonia as an infection that fills the tiny air sacs of the lungs with fluid and pus, making breathing painful and reducing oxygen intake. (World Health Organization)

Pneumonia remains one of the leading infectious causes of death in children under five globally, with the burden particularly high in sub-Saharan Africa and South Asia. UNICEF estimates that more than 700,000 children under five die from pneumonia each year worldwide. (UNICEF DATA)

Quick Answer: What Is Pneumonia?

Pneumonia is an infection affecting one or both lungs.

It can be caused by:

bacteria
viruses
fungi in some situations

In children, the most important symptoms include:

cough
difficult breathing
fast breathing
fever
chest indrawing
poor feeding
weakness

Some children develop severe disease with low oxygen levels, inability to drink, seizures or reduced consciousness.

These danger signs require urgent medical attention.

What Happens in the Lungs During Pneumonia?

The lungs contain millions of tiny air sacs called alveoli.

Normally, these air sacs fill with air.

During pneumonia, infection causes inflammation and the alveoli may fill with fluid or pus.

This reduces the amount of oxygen that can move from the lungs into the bloodstream. (Schn Health)

The harder the lungs have to work, the more likely a child is to breathe rapidly or use extra chest muscles.

What Causes Pneumonia?

Pneumonia can be caused by different microorganisms.

Bacterial Pneumonia

Several bacteria can cause pneumonia.

Historically, Streptococcus pneumoniae has been an important cause of childhood bacterial pneumonia.

Other bacteria can also be responsible depending on age, vaccination status and underlying health conditions.

Viral Pneumonia

Viruses can also cause pneumonia.

These include respiratory viruses such as respiratory syncytial virus, influenza and others.

The symptoms of viral and bacterial pneumonia can overlap considerably, which is one reason diagnosis cannot always be made accurately from symptoms alone. WHO specifically notes that the clinical presentation of viral and bacterial pneumonia can be similar. (World Health Organization)

Fungal Pneumonia

Fungal causes are less common in otherwise healthy children but can become important in people with severe immune suppression.

What Are the Symptoms of Pneumonia in Children?

Common symptoms can include:

cough
fever
rapid breathing
difficulty breathing
chest pain
poor appetite
tiredness
weakness
vomiting in some children

In babies, symptoms can be less specific.

An infant may become unusually sleepy, feed poorly, breathe rapidly or appear generally unwell.

What Is Fast Breathing?

Fast breathing is one of the key clinical signs used in childhood pneumonia assessment.

The important point is that normal respiratory rate changes with age.

A breathing rate that is normal for an infant may be abnormal for an older child.

Health workers therefore interpret breathing rate according to the child's age and clinical condition.

Parents do not need to diagnose pneumonia from a stopwatch alone.

But if a child is obviously breathing much faster than usual, particularly when accompanied by cough, fever or difficulty breathing, the child should be assessed.

What Is Chest Indrawing?

Chest indrawing occurs when the lower chest wall moves inward when the child breathes in.

Normally, the chest expands during inhalation.

When breathing becomes difficult, increased effort can cause the chest wall to pull inward.

WHO uses lower chest wall indrawing as an important sign when assessing childhood pneumonia. (World Health Organization)

It should not be ignored.

What Are the Danger Signs of Severe Pneumonia?

Seek urgent medical care if a child has:

severe difficulty breathing
chest indrawing that is pronounced
inability to drink or breastfeed
repeated vomiting preventing fluid intake
seizures
unusual sleepiness or reduced consciousness
bluish lips or face
grunting
severe weakness
signs of low oxygen

A child who is struggling to breathe should not be kept at home waiting to see whether cough syrup will help.

Can Pneumonia Occur Without Fever?

Yes.

Although fever is common, pneumonia does not always cause high fever.

Very young infants, severely ill children or people with weakened immune systems may not show a typical fever response.

Breathing difficulty is often more important than fever alone.

Is Pneumonia the Same as a Cold?

No.

A common cold mainly affects the upper respiratory tract.

Pneumonia affects the lungs.

Some respiratory infections can begin with cold-like symptoms and later progress to pneumonia, but the two conditions are not interchangeable.

Is Pneumonia the Same as Bronchitis?

No.

Bronchitis mainly involves inflammation of the larger airways.

Pneumonia affects lung tissue and the air sacs.

Symptoms can overlap, which is why clinical assessment matters.

Can Pneumonia Spread From One Person to Another?

The infection causing pneumonia may sometimes spread between people.

For example, respiratory viruses and some bacteria can spread through respiratory droplets, close contact or contaminated hands and surfaces.

But “pneumonia” itself is not one single contagious organism.

Different causes have different transmission patterns.

How Is Pneumonia Diagnosed?

Diagnosis begins with clinical assessment.

A healthcare professional may consider:

symptoms
breathing rate
chest movement
oxygen saturation
temperature
feeding ability
age
general condition

In many children, clinical assessment is sufficient to begin management.

Additional tests may be required in some cases.

Is a Chest X-Ray Always Needed?

No.

Not every child with suspected pneumonia requires a chest X-ray.

Imaging may be more useful when:

diagnosis is uncertain
disease is severe
complications are suspected
the child is not improving as expected

Modern paediatric guidelines increasingly avoid unnecessary imaging in uncomplicated cases. (Infectious Diseases Society of America)

Why Oxygen Measurement Matters

One of the most important advances in pneumonia care is the use of pulse oximetry.

A pulse oximeter estimates the oxygen saturation in the blood.

Low oxygen, known as hypoxaemia, is an important marker of severe pneumonia and may indicate the need for oxygen therapy or hospital care.

Where available, pulse oximetry can improve recognition of seriously ill children.

How Is Pneumonia Treated?

Treatment depends on:

age
severity
likely cause
oxygen level
underlying health conditions
ability to drink
local clinical guidelines

Do All Children With Pneumonia Need Antibiotics?

No.

Antibiotics treat bacterial infections, not viruses.

However, because distinguishing bacterial from viral pneumonia can be difficult in young children, clinical guidelines sometimes recommend antibiotics based on specific signs and risk categories.

WHO's 2024 consolidated guideline continues to use oral amoxicillin as first-line treatment for many children with uncomplicated bacterial pneumonia, including some children with chest indrawing who can be managed safely outside hospital under appropriate protocols. (World Health Organization)

Parents should not start leftover antibiotics at home or select an antibiotic based on an old blog article.

Why Antibiotic Misuse Matters

Using antibiotics unnecessarily can:

cause side effects
promote antimicrobial resistance
make future infections harder to treat
delay correct diagnosis

The right question is not:

“Which antibiotic treats cough?”

It is:

“Does this child have bacterial pneumonia, and what treatment does the clinical guideline recommend?”

When Does a Child Need Hospital Care?

Hospital treatment may be needed when the child has:

severe breathing difficulty
hypoxaemia
inability to drink
persistent vomiting
seizures
altered consciousness
serious underlying illness
complications
very young age with significant illness

Some children may require oxygen, intravenous fluids, injectable antibiotics or more intensive monitoring.

Can Pneumonia Be Treated at Home?

Some mild cases can be managed outside hospital after appropriate assessment.

That does not mean “home treatment” should consist of cough mixtures alone.

Parents need clear instructions about:

prescribed medicines
fluids and feeding
signs of deterioration
when to return
follow-up

A child whose breathing worsens should be reassessed promptly.

Should Cough Syrup Be Given?

Cough medicines do not treat pneumonia itself.

In young children, some over-the-counter cough and cold products may be inappropriate.

Do not allow a cough syrup to delay evaluation of breathing difficulty.

The underlying infection and oxygen status matter much more.

Should Children Continue Eating and Drinking?

Yes, when they are able.

Children with pneumonia need adequate fluid and nutrition.

Breastfeeding should generally continue in infants.

A child who cannot drink or breastfeed is showing a danger sign and needs urgent assessment.

Can Pneumonia Cause Low Oxygen Without Obvious Blue Lips?

Yes.

Visible bluish discoloration is a late sign.

A child can have dangerously low oxygen saturation before obvious cyanosis develops.

This is one reason pulse oximetry is valuable when available.

What Complications Can Pneumonia Cause?

Possible complications include:

severe respiratory failure
pleural effusion
empyema
sepsis
lung abscess
death

A pleural effusion occurs when fluid collects around the lung.

If infected pus collects in that space, it is called empyema.

Recent 2026 paediatric guidance continues to address ultrasound and other approaches for evaluating these complications. (OUP Academic)

Who Is Most at Risk?

Children at increased risk of severe pneumonia can include those who are:

very young
malnourished
incompletely vaccinated
living with significant immune suppression
exposed to indoor air pollution
exposed to tobacco smoke
living in overcrowded conditions
affected by other chronic illnesses

Pneumonia and Malnutrition

Malnutrition weakens immune defence.

Children who are undernourished may have more difficulty fighting infection and may develop more severe disease.

This is one reason childhood pneumonia prevention is connected with broader child nutrition and health services.

Pneumonia and HIV

Children with significant HIV-related immune suppression can be at increased risk of severe pneumonia and opportunistic infections.

Effective HIV diagnosis and treatment help protect immune function.

For general HIV information, read How HIV Is Transmitted: Facts, Risks and Myths.

How Can Pneumonia Be Prevented?

Prevention involves several interventions rather than one magic solution.

Vaccination

Vaccines help prevent several important causes of childhood pneumonia.

These include vaccines against:

pneumococcus
Haemophilus influenzae type b
pertussis
measles
influenza in appropriate settings

Routine childhood immunization is therefore an important pneumonia-prevention strategy.

If a child has missed vaccines, see our guide to Missed Childhood Vaccines in Nigeria: What Parents Should Do About Delayed Immunization.

Breastfeeding

Exclusive breastfeeding during the first six months of life helps support infant immunity and nutrition.

WHO identifies adequate nutrition and breastfeeding as important parts of reducing childhood pneumonia risk. (World Health Organization)

Reduce Indoor Air Pollution

Smoke exposure can increase respiratory disease risk.

Important sources include:

tobacco smoke
poorly ventilated cooking fires
some household fuels

Reducing children's exposure to smoke can contribute to respiratory health.

Hand Hygiene

Handwashing helps reduce transmission of respiratory and gastrointestinal infections.

Parents and caregivers should wash hands regularly, particularly before feeding children and after coughing, sneezing or caring for someone who is ill.

Good Nutrition

Adequate nutrition supports immune function.

Children with significant malnutrition require appropriate nutritional assessment and support.

Pneumonia in Nigeria

Pneumonia remains particularly important in Nigeria because of the country's large population of young children and continued challenges involving:

delayed care seeking
incomplete vaccination
malnutrition
access to oxygen
referral systems
antibiotic availability
diagnostic capacity

Research from Nigeria has repeatedly highlighted health-system barriers affecting childhood pneumonia care, including recognition, referral, oxygen availability and adherence to treatment guidelines. (PubMed Central (PMC))

This means reducing pneumonia deaths requires more than telling parents to “bring the child early.”

Health facilities also need to be ready when the child arrives.

Why Oxygen Access Matters in Nigeria

A child with severe pneumonia may need oxygen urgently.

Oxygen systems therefore need:

reliable supply
functioning concentrators or cylinders
electricity
pulse oximeters
trained staff
maintenance

Without these, recognition of severe pneumonia does not automatically translate into effective treatment.

Common Pneumonia Myths

Myth: Every child with cough has pneumonia.

Fact: Many illnesses cause cough. Pneumonia is assessed using breathing signs, clinical examination and other information.

Myth: Pneumonia always causes fever.

Fact: Fever is common but may be absent.

Myth: Every pneumonia case needs an injection.

Fact: Many uncomplicated childhood pneumonia cases can be treated with oral antibiotics when bacterial pneumonia is suspected and the child meets appropriate criteria. (World Health Organization)

Myth: Stronger antibiotics are always better.

Fact: Antibiotic choice should follow clinical guidance. Unnecessary broad-spectrum antibiotics contribute to resistance.

Myth: If the child stops coughing, the pneumonia is cured.

Fact: Improvement must be judged from the child's overall condition, breathing, fever, feeding and other clinical signs.

Myth: Herbal mixtures can replace pneumonia treatment.

Fact: Severe pneumonia can cause hypoxaemia and death. Unproven remedies should not delay medical assessment.

Frequently Asked Questions

What is the main symptom of pneumonia in children?

Cough or difficult breathing together with fast breathing or chest indrawing are important signs used in clinical assessment. (World Health Organization)

Can pneumonia kill a child?

Yes. Pneumonia remains a major infectious cause of death in children under five. (UNICEF DATA)

Does pneumonia always need antibiotics?

No. Viral pneumonia does not respond to antibiotics. Clinical guidelines determine when antibiotics are appropriate.

What is chest indrawing?

It is inward movement of the lower chest wall during inhalation and can be a sign of increased breathing effort.

Is fast breathing dangerous?

Fast breathing can be an important sign of pneumonia, particularly when accompanied by cough or difficulty breathing.

Can pneumonia cause low oxygen?

Yes. Pneumonia can impair oxygen transfer in the lungs and cause hypoxaemia.

Is pneumonia preventable?

Many cases can be prevented through vaccination, breastfeeding, good nutrition, reduced smoke exposure and early treatment of illness.

Should a child with pneumonia continue breastfeeding?

Yes, unless a healthcare professional advises otherwise. Inability to breastfeed or drink is a danger sign.

Key Takeaways

Pneumonia is more than a cough.

Watch especially for:

fast breathing
difficult breathing
chest indrawing
inability to drink
severe weakness
reduced consciousness
low oxygen

Do not rely on cough syrup or herbal remedies when a child is struggling to breathe.

Antibiotics are important for bacterial pneumonia but should be used according to clinical guidance.

Vaccination, nutrition, breastfeeding, smoke reduction and early care can prevent many severe cases.

The Bottom Line

The most useful question for a parent is not:

“Does my child have a cough?”