Pneumonia is an infection of the lungs. The tiny air sacs in the lungs can become inflamed and fill with mucus, fluid, or pus, causing cough, fever, fast breathing, chest pain, tiredness, poor eating, or vomiting.
For a 3½-year-old, pneumonia should be assessed by a pediatrician today, especially if she has chest or back pain, fever, or is breathing faster than usual.
Go to the emergency department now / call emergency services if she has:
- Difficulty breathing, ribs or skin pulling inward between/under the ribs, grunting, or nostrils flaring
- Blue, gray, or very pale lips/nails
- Cannot drink, repeated vomiting, very sleepy/confused, or few/no urine for 8 hours
- Severe chest pain, worsening condition, or a very high/persistent fever
- At age 3.5 years, a resting breathing rate of 40 or more breaths per minute is concerning, particularly with chest indrawing.
These are recognized warning signs of respiratory distress in children.
AAP child pneumonia guidance
“Filled around chest and back” can mean two different things
- Pneumonia inside the lung: infection-related mucus/fluid in lung air spaces. This is common.
- Fluid around the lung, called a pleural effusion or parapneumonic effusion: a complication where fluid collects between the lung and chest wall. It can cause pain in the chest/back, shortness of breath, or persistent fever. This needs prompt hospital assessment. A textbook defines it as pleural fluid associated with a lung infection. - Tintinalli's Emergency Medicine: A Comprehensive Study, section “Introduction and Epidemiology”
It is not possible to tell which one she has without examining her. A clinician may need to check oxygen level and order a chest X-ray or ultrasound.
Usual treatment
Treatment depends on the cause and severity:
- Viral pneumonia: rest, fluids, fever/pain medicine recommended for her age/weight, and observation. Antibiotics do not treat viruses.
- Bacterial pneumonia: prescribed antibiotics. Complete the entire course exactly as prescribed.
- More severe illness: hospital care may include oxygen, IV fluids, and IV antibiotics.
- Fluid/pus around the lung: sometimes the team must remove it with a needle or chest tube. This is considered when imaging shows a significant or infected collection, or the child is not improving with antibiotics.
Do not start leftover antibiotics, cough suppressants, or give adult medications. Do not force food, but offer frequent small sips of fluid if she can drink safely.
Risk factors
Risk is higher in children under 5, those exposed to cigarette smoke, not fully vaccinated, with asthma/chronic lung or heart disease, poor nutrition, or immune-system problems. Viral infections can also lead to secondary bacterial pneumonia. - Park's Textbook of Preventive and Social Medicine, section “Severe pneumonia”
If “filled around the chest and back” means visible swelling, a rash, or she is currently struggling to breathe, seek emergency care now.