Most adults and older children have several respiratory infections
each year. Respiratory problems can be as minor as the common cold or as
serious as
pneumonia. They may affect the upper respiratory
system (nose, mouth, sinuses, and throat) or the lower bronchial tubes and
lungs. See a picture of the
respiratory system.
Upper respiratory system
The upper respiratory
system includes the nose, mouth, sinuses, and throat. When you have an upper
respiratory infection, you may feel uncomfortable, have a stuffy nose, and
sound very congested. Other symptoms of an upper respiratory infection
include:
Facial pain or pressure.
A runny
or stuffy nose, which may lead to blockage of the nasal passages and cause you
to breathe through your mouth.
A sore
throat.
Irritability, restlessness, poor appetite, and decreased
activity level.
Coughing, especially when lying
down.
Fever that occurs suddenly and may reach
103
°F (39
°C) or higher.
Lower respiratory system
The lower respiratory
system includes the bronchial tubes and lungs. Respiratory problems are less
common in the lower respiratory system than upper respiratory system.
The 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.
Symptoms of lower respiratory system
infections include:
Cough, which continues throughout the day and
night, often producing green, yellow, brown, or gray mucus (sputum) from the
lungs.
Fever, which may be high with some lower respiratory system
infections, such as pneumonia.
Flaring the nostrils and using the neck, chest, and
abdominal muscles to breathe, causing a "sucking in" between or under the ribs
(retractions).
Chest pain with exertion or when you take a
deep breath.
Respiratory problems may have many causes.
Viral infections
Viral infections are the most
common cause of upper respiratory symptoms. Symptoms of a viral illness often
come on quickly (over hours to a day or two) without prior illness. Common
viral illnesses include colds and influenza (flu).
Colds are minor upper respiratory illnesses
that usually go away without treatment. Symptoms may include cough, mild sore
throat, nasal congestion, runny nose or sneezing, and occasionally a fever of
101
°F (38
°C) or lower.
Influenza (flu) symptoms are usually more severe than
a cold. The key symptoms in adults are fever, often
104
°F (40
°C) or higher, and
body aches. Headache, eye pain, muscle aches, and cough are also common. For
more information, see the topic
Influenza.
Antibiotics are not used to treat viral illnesses and do
not alter the course of viral infections. Unnecessary use of an antibiotic
exposes you 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.
Severe
acute respiratory syndrome (SARS) is caused by a type of
coronavirus, a family of viruses that often cause mild to moderate upper
respiratory illness, such as the common cold. For more
information, see the topic
Severe Acute Respiratory Syndrome (SARS).
Bacterial infections
Bacterial infections may
develop after a viral illness, such as a cold or influenza, and are less common
than viral illnesses. Bacterial infections may affect the upper or lower
respiratory system. Symptoms tend to localize to one area. In the upper
respiratory system, the most common sites of bacterial infections are the
sinuses and throat. In the lower respiratory system, the most common sites are
the bronchial tubes (bronchitis) and
the lungs (pneumonia).
Bacterial infections are more
common in smokers, people exposed to secondhand smoke, and people with chronic
lung disease (such as
asthma or chronic obstructive pulmonary disease [COPD]) and other chronic medical problems. Antibiotics
can effectively treat most bacterial infections.
Allergies
Allergies, especially
hay fever, are another common respiratory problem. Symptoms include
sneezing, clear runny drainage from the nose and eyes, itchy eyes or nose, and
stuffy, congested ears and sinuses. The symptoms of allergies often last longer
than a typical viral respiratory infection. For more information, see the topic
Allergic Rhinitis.
Asthma
Asthma is a
chronic disease of the respiratory system. It causes
inflammation and narrowing in the tubes that carry air
to the lungs (bronchial tubes). The inflammation leads to difficulty breathing,
wheezing, tightness in the chest, and cough.
Asthma often begins during childhood and may last throughout a person's
life. The cause of asthma is not clearly known. It is more common in people who
also have allergies. For more information, see the topic the topic
Asthma in Children or
Asthma in Teens and Adults.
Review the Emergencies and Check Your Symptoms
sections to determine if and when you need to see a doctor.
Difficulty breathing and choking on an object in the
windpipe occurs.
Note:
If choking is present, go to the
topic
Choking Rescue Procedure. Do not perform the Heimlich
maneuver if the person is still coughing or able to speak.
Chest
discomfort or pain is crushing or squeezing or feels like a heavy weight on the
chest.
Chest discomfort or pain occurs with:
Sweating.
Shortness of
breath.
Nausea or vomiting.
Pain that spreads from the
chest to the back, neck, jaw, upper abdomen, or one or both shoulders or arms.
See an illustration of
chest pain.
Rapid swelling of the throat or tongue (angioedema)
occurs.
Check Your Symptoms
If you answer yes to any of the following questions, click on the "Yes" in front of the question for information about how soon to see a health professional.
Review
health risks that may increase the seriousness of your
symptoms.
If you have any of the following
symptoms, evaluate those symptoms first.
Breathing at a
fast rate and feeling anxious: Go to the topic
Hyperventilation.
Smoke or chemical fume inhalation: Go to the topic
Burns.
Note:
If you have a history of
asthma,
chronic obstructive pulmonary disease (COPD), or
another chronic breathing problem and your doctor has given you a plan for
handling your respiratory problem, seek medical care according to your
plan.
Did other
symptoms begin after starting a medicine?
Note:
If your answer is yes:
Call the doctor who prescribed the
medicine the same day (before your next dose) to determine whether you should
stop taking the medicine or take a different one. An appointment may not be
necessary.
If you are taking a nonprescription medicine, stop
taking it. If you feel you need to continue taking the medicine, call your
doctor.
If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you have a chronic respiratory disease,
such as
asthma or
chronic obstructive pulmonary disease (COPD), compare
your symptoms to what is normal for you. Your need for a doctor visit will
depend on what is normal for you and what you have discussed with your
doctor.
Call your health professional immediately if you answer "Yes" to
any of the following questions.
See
significance of fever if you need information to help
you answer the questions below.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you need information on how to take
a temperature, see the topic
Body Temperature.
If you have a
health risk that may put you at higher risk for a
problems with a fever and respiratory symptoms, follow the instructions your
doctor has given you about fever.
Call your health professional immediately if you answer "Yes" to
any of the following questions.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you have a chronic respiratory disease,
such as
asthma or
chronic obstructive pulmonary disease (COPD), compare
your symptoms to what is normal for you. Your need for a doctor visit will
depend on what is normal for you and what you have discussed with your
doctor.
Call your health professional today if you answer "Yes" to
the following question.
Difficulty breathing and choking on an object in the
windpipe occurs.
Note:
If choking is present, go to the
topic
Choking Rescue Procedure. Do not perform the Heimlich
maneuver if the person is still coughing or able to speak.
Chest
discomfort or pain is crushing or squeezing or feels like a heavy weight on the
chest.
Chest discomfort or pain occurs with:
Sweating.
Shortness of
breath.
Nausea or vomiting.
Pain that spreads from the
chest to the back, neck, jaw, upper abdomen, or one or both shoulders or arms.
See an illustration of
chest pain.
Rapid swelling of the throat or tongue (angioedema)
occurs.
Check Your Symptoms
If you answer yes to any of the following questions, click on the "Yes" in front of the question for information about how soon to see a health professional.
Review
health risks that may increase the seriousness of your
symptoms.
If you have any of the following
symptoms, evaluate those symptoms first.
Breathing at a
fast rate and feeling anxious: Go to the topic
Hyperventilation.
Smoke or chemical fume inhalation: Go to the topic
Burns.
Note:
If you have a history of
asthma,
chronic obstructive pulmonary disease (COPD), or
another chronic breathing problem and your doctor has given you a plan for
handling your respiratory problem, seek medical care according to your
plan.
Did other
symptoms begin after starting a medicine?
Note:
If your answer is yes:
Call the doctor who prescribed the
medicine the same day (before your next dose) to determine whether you should
stop taking the medicine or take a different one. An appointment may not be
necessary.
If you are taking a nonprescription medicine, stop
taking it. If you feel you need to continue taking the medicine, call your
doctor.
If you have answered "No" to the above questions, go back to Check Your Symptoms and continue to answer the questions to evaluate your symptoms.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you have a chronic respiratory disease,
such as
asthma or
chronic obstructive pulmonary disease (COPD), compare
your symptoms to what is normal for you. Your need for a doctor visit will
depend on what is normal for you and what you have discussed with your
doctor.
Call your health professional immediately if you answer "Yes" to
any of the following questions.
See
significance of fever if you need information to help
you answer the questions below.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you need information on how to take
a temperature, see the topic
Body Temperature.
If you have a
health risk that may put you at higher risk for a
problems with a fever and respiratory symptoms, follow the instructions your
doctor has given you about fever.
Call your health professional immediately if you answer "Yes" to
any of the following questions.
Review
health risks that may increase the seriousness of your
symptoms.
Note:
If you have a chronic respiratory disease,
such as
asthma or
chronic obstructive pulmonary disease (COPD), compare
your symptoms to what is normal for you. Your need for a doctor visit will
depend on what is normal for you and what you have discussed with your
doctor.
Call your health professional today if you answer "Yes" to
the following question.
If a visit to a health professional is not needed immediately, see the Home Treatment section for self-care information.
Home Treatment
Home treatment can help you feel
more comfortable when you have mild to moderate respiratory symptoms.
Prevent
dehydration. Hot fluids, such as tea or soup, may help
relieve congestion in your nose and throat. If you have a productive cough,
fluids may help thin the
mucus in your lungs so your cough can clear it
out.
Get extra rest; let your symptoms be your guide. If you have a
cold, you may be able to stick to your usual routine and just get some extra
sleep.
Let yourself cough if you have a cough that brings up mucus
from the lungs. It can help prevent bacterial infections. People who have
chronic
bronchitis or
emphysema need to cough to help clear mucus from their
lungs.
For a sore throat, gargle at least once each hour with warm
salt water [1 tsp (5 g) of salt in
8 fl oz (237 mL) of water] to
reduce swelling and discomfort. For more information, see the topic
Sore Throat.
Keep in mind the following guidelines for taking
over-the-counter medicine for your symptoms:
Use
decongestant nasal sprays sparingly and for only 3
days or less. Continued use may lead to a rebound effect, which causes the
mucous membranes to become more swollen than they were before you started using
the spray. Learn how to make
saline nose drops at home that will not cause a
rebound effect.
For more detailed information on
decongestants,
antihistamines, and cough medicines, go to the Cold
and Allergy Remedies section of the topic
Nonprescription Medicines and Products. Studies show
that over-the-counter cough medicines do not work very well. And some of these
medicines can cause problems if you use too much of them. It is important to
use medicines correctly and to keep them out of the reach of children to
prevent accidental use. Check with the doctor before giving these medicines to
children.
If you have a dry, hacking cough that does not bring up any
sputum, ask your doctor about an effective cough suppressant medicine. For more
information, see the topic
Coughs.
Medicine you can buy without a prescription
Try a nonprescription
medicine to help treat your fever or pain:
Aspirin (also a nonsteroidal
anti-inflammatory drug), such as Bayer or Bufferin
Talk to your child's doctor before switching back and
forth between doses of acetaminophen and ibuprofen. When you switch between two
medicines, there is a chance your child will get too much medicine.
Safety tips
Be sure to follow
these safety tips when you use a nonprescription medicine:
Carefully read and follow all
directions on the medicine bottle and box.
Do not take more than
the recommended dose.
Do not take a medicine if you have had an
allergic reaction to it in the past.
If
you have been told to avoid a medicine, call your doctor before you take
it.
If you are or could be pregnant, do not take any medicine other
than acetaminophen unless your doctor has told you to.
Many people
use alternative medicines or supplements to prevent colds or to shorten their
cold symptoms. Before using any treatment for your cold symptoms, it is
important to consider the risks and benefits of the treatment. For more
information, see the topic
Complementary Medicine. Some of the common alternative
medicines or supplements used are:
Echinacea. Studies
show echinacea may keep you from getting a cold and may help you get better
faster.1 Echinacea can cause severe
allergic reactions in some people with a history of
asthma, allergies, hay fever, or eczema.
Vitamin C. Long-term daily use of vitamin C
in large doses does not appear to prevent colds. There may be a slight
reduction in the length of time cold symptoms last when high doses are taken.
Additional studies must be done to determine how much vitamin C is needed to
reduce the length of time cold symptoms are present.
Zinc. Experts disagree about the usefulness of zinc to shorten
the duration of common cold symptoms. In adults, the use of zinc nasal gel has
been shown to reduce the length of a cold. But zinc products that you use in
your nose to treat cold symptoms may cause a permanent loss of the ability to
smell in a very small number of people.
If you decide to use an alternative medicine or
supplement, follow these precautions.
As with all conventional medicines and
supplements, it is important to follow the directions on the
label.
Do not exceed the maximum recommended dose.
If
you are or could be pregnant, talk with your doctor before taking any medicine
or supplement.
If you have another health problem or take
prescription medicines, talk with your doctor before taking an alternative
medicine or supplement.
Symptoms to Watch For During Home Treatment
Use the Check Your Symptoms section to
evaluate your symptoms if any of the following occur during home
treatment:
Increasing difficulty breathing
develops.
Wheezing develops.
New pain develops or pain
localizes to one area, such as a sinus area, ear, throat, or
chest.
Symptoms persist in spite of home
treatment.
Symptoms become more severe or frequent.
Prevention
There is no sure way to prevent respiratory
illnesses. To help reduce your risk:
Wash your hands often, especially when
you are around people with colds.
Keep your hands away from your
nose, eyes, and mouth. These are the places where viruses are most likely to
enter your body.
Do not smoke or use other tobacco products.
Smoking irritates the mucous membranes of the nose, sinuses, and lungs, which
may make them more susceptible to infections. For more information, see the
topic
Quitting Tobacco Use.
If you live an area
that has problems with air pollution or smoke from wildfires:
Stay indoors and avoid breathing in smoke,
ashes, or polluted air.
Do not exercise outdoors if you smell smoke
or notice irritation of your eyes, nose, or throat.
Keep your motor
vehicle windows rolled up and the vents closed when driving.
Avoid cleanup activities, such as raking leaves
or cutting brush.
Avoid exposure to chemicals. Do not spray or
apply chemicals unless you are wearing protective clothing, such as a
particle-filtering respirator, safety goggles, and gloves.
Exercise
regularly. For more information, see the topic
Fitness.
Get a flu (influenza) vaccine each autumn if you are older than
age 50 or have a
health risk that increases your risk for a serious
problem. For more information, see the topic
Influenza.
You can help your
doctor diagnose and treat your condition by being prepared to answer the
following questions:
When did your symptoms start?
Is
your respiratory problem localized, such as involving only one ear, one side of
your sinuses, or the lungs?
Did symptoms start as a cold but now
appear to be worse than you would expect from a cold?
Have you had
similar symptoms before? How were they treated?
Do you have a
productive cough? Are you coughing up clear, white, green, yellow, or
blood-tinged mucus? How much mucus are you bringing up? Are you coughing up
mucus all day long or mostly at nighttime?
Have you had fever and
chills?
Are you wheezing, or do you have new or worsening shortness
of breath?
Do you have severe headache, earache, or sore
throat?
Do any other members of your family or work group have
similar symptoms?
Have you recently been exposed to large amounts
of dust, fumes, smoke, or chemicals?
Do you smoke or use other
tobacco products?
Have you recently used an indoor hot tub, pool,
or spa?
What home treatment have you tried? Did it help?
What prescription, nonprescription, or alternative medicines have
you tried? Did they help?
Have you recently traveled inside or
outside of your home country?
Shah SA, et al. (2007). Evaluation of echinacea for
the prevention and treatment of the common cold: a meta-analysis.
Lancet Infectious Diseases, 7(7): 473-480.
This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
Shah SA, et al. (2007). Evaluation of echinacea for
the prevention and treatment of the common cold: a meta-analysis.
Lancet Infectious Diseases, 7(7): 473-480.