Topic Overview
Most babies and older children have several mild infections of the
respiratory system each year.
Upper respiratory system
The upper respiratory
system includes the nose, mouth, sinuses, and throat. A child with an upper
respiratory infection may feel uncomfortable and sound very congested. Other
symptoms of an upper respiratory infection include:
- A runny or stuffy nose. This may lead to blockage of the nasal
passages, causing the child to breathe through his or her mouth.
- Irritability, restlessness, poor appetite, and decreased activity
level.
- Coughing, especially when lying down.
- Fever that occurs suddenly and may reach
105°F (41°C).
Lower respiratory system
The lower respiratory
system includes the bronchial tubes and lungs. Respiratory problems are less
common in the lower respiratory system than in the upper respiratory
system.
Symptoms of a lower respiratory (bronchial tubes and
lungs) problem usually are more severe than symptoms of an upper respiratory
(mouth, nose, sinuses, and throat) problem. A child with a lower respiratory
problem is more likely to require a visit to a doctor than a child with an
upper respiratory problem.
Symptoms of lower respiratory system
infections include:
- Shallow coughing, which continues throughout the day and
night.
- Fever, which may be high with some lower respiratory system
infections, such as pneumonia.
- Irritability, restlessness, poor appetite, and decreased activity
level.
-
Difficulty breathing
. You may notice:
- Rapid breathing.
- Grunting, which is heard during the breathing out (exhaling)
phase of breathing. Most babies grunt occasionally when they sleep. But
grunting that occurs with rapid, shallow breathing may mean lower
respiratory system infection.
- Wheezing (which is a different sound than
croup).
- Flaring the nostrils and using the neck, chest, and abdominal
muscles to breathe, causing a "sucking in" between or under the ribs (retractions).
Respiratory problems may have many causes.
Viral infections
Viral infections cause most upper
respiratory infections. Sore throats, colds, croup, and
influenza (flu) are common viral illnesses in babies
and older children. These infections are usually mild and go away in 4 to 10
days, but they can sometimes be severe. For more information, see the topics
Croup and
Influenza (Seasonal Flu).
Home treatment can help
relieve the child's symptoms. The infection usually improves on its own within
a week and is gone within 14 days.
Antibiotics are not used to
treat viral illnesses and do not alter the course of viral infections.
Unnecessary use of an antibiotic exposes your child to the risks of an
allergic reaction and antibiotic side effects, such as
nausea, vomiting, diarrhea, rashes, and yeast infections. Antibiotics also may
kill beneficial bacteria and encourage the development of dangerous
antibiotic-resistant bacteria.
Viral
lower respiratory system infections may be mild, similar to upper respiratory
system infections. An example of a possibly serious viral infection is
bronchiolitis. Up to 10% of babies and children with
viral infections of the lower respiratory system, such as those caused by
respiratory syncytial virus (RSV), may develop severe
blockage of the air passages and require hospitalization for treatment. For
more information, see the topics
Acute Bronchitis, Pneumonia, and Respiratory Syncytial Virus (RSV) Infection.
Bacterial infections
The most common sites for
bacterial infections in the upper respiratory system are the sinuses and
throat. A
sinus infection is an example of an upper respiratory
bacterial infection.
Bacterial
pneumonia may follow a viral illness as a secondary infection or appear as the
first sign of a lower respiratory infection. In babies and small children, the
first sign of infection often is rapid breathing, irritability, decreased
activity, and poor feeding. Antibiotics are effective against bacterial
infections.
Tuberculosis
is a less common bacterial
infection of the lower respiratory system.
Allergies
Allergies are a common cause of
respiratory problems. Allergy symptoms in children include:
- Clear, runny drainage from the nose or a stuffy nose. Children
often rub their noses by pushing the tip upward with the palm of the hand
("allergic salute").
- Sneezing and watery eyes. Often there are dark circles under the
eyes ("allergic shiners").
- Irritability and loss of appetite.
Asthma
Babies and small children usually do not have
asthma. But the number of new cases of asthma
increases with age.
- In babies and small children, a hacking cough may be the only
symptom of mild asthma.
- If asthma worsens, symptoms may include wheezing and shortness of
breath after exercise or at nighttime.
- In severe asthma, difficulty breathing (using the neck, chest,
and abdominal muscles to breathe) and a high-pitched sound when breathing
(wheezing) are the most common symptoms.
- Allergies and asthma often occur together. For more information,
see the topic
Asthma in Children.
Other causes
Besides asthma, allergies, and
infection, other possible causes of respiratory problems in children
include:
- Exposure to cigarette smoke. Tobacco smoke impairs lung growth
and development. Children who are exposed to tobacco smoke, even before birth
(prenatal), are more likely to have asthma and other respiratory
problems.
- Blockage of the airway by an
inhaled object, such as food, a piece of a balloon, or
a small toy. For more information, see the topic
Swallowed or Inhaled Objects.
- Problems that have been present from birth (genetic causes), such
as
cystic fibrosis.
Babies and children younger than age 3 may have more
symptoms with respiratory problems than older children, and they may become
more ill. For this reason, younger children need to be watched more closely.
The type and severity of the symptoms helps determine whether your child needs
to see a doctor.
Check your child's symptoms to decide if
and when your child should see a doctor.