Bronchiectasis (brong-ke-EK-tah-sis) is a condition in which damage to the airways causes them to widen and become flabby and scarred. The airways are tubes that carry air in and out of your lungs.
Bronchiectasis often is caused by an infection or other condition that injures the walls of the airways or prevents the airways from clearing mucus. Mucus is a slimy substance. It helps remove inhaled dust, bacteria, and other small particles from the airways.
In bronchiectasis, your airways slowly lose their ability to clear out mucus. The mucus builds up, and bacteria begin to grow. This leads to repeated, serious lung infections.
Each infection causes more damage to the airways. Over time, the airways can't properly move air in and out of the lungs. As a result, the body's vital organs might not get enough oxygen.
Bronchiectasis can affect just one section of one of your lungs or many sections of both lungs.
The initial lung damage that leads to bronchiectasis often begins in childhood. However, symptoms may not occur until months or even years after you start having repeated lung infections.
In the United States, common childhood infections—such as whooping cough and measles—used to cause many cases of bronchiectasis. However, these causes are now less common because of vaccines and antibiotics.
Now bronchiectasis usually is due to a medical condition that injures the airway walls or prevents the airways from clearing mucus. Examples of such conditions include cystic fibrosis and primary ciliary (SIL-e-ar-e) dyskinesia (dis-kih-NE-ze-ah), or PCD.
Bronchiectasis that affects only one part of the lung may be caused by a blockage rather than a medical condition.
Bronchiectasis can be congenital (kon-JEN-ih-tal) or acquired. Congenital bronchiectasis affects infants and children. It's the result of a problem with how the lungs form in a fetus.
Acquired bronchiectasis occurs as a result of another condition or factor. This type of bronchiectasis can affect adults and older children. Acquired bronchiectasis is more common than the congenital type.
Currently, bronchiectasis has no cure. However, with proper care, most people who have it can enjoy a good quality of life.
Early diagnosis and treatment of bronchiectasis are important. The sooner your doctor starts treating bronchiectasis and any underlying conditions, the better your chances of preventing further lung damage.
Damage to the walls of the airways usually is the cause of bronchiectasis. A lung infection may cause this damage. Examples of lung infections that can lead to bronchiectasis include:
Conditions that damage the airways and raise the risk of lung infections also can lead to bronchiectasis. Examples of such conditions include:
Other conditions, such as an airway blockage, also can lead to bronchiectasis. Many things can cause a blockage, such as a growth or a noncancerous tumor. An inhaled object, such as a piece of a toy or a peanut that you inhaled as a child, also can cause an airway blockage.
A problem with how the lungs form in a fetus may cause congenital bronchiectasis. This condition affects infants and children.
People who have conditions that damage the lungs or increase the risk of lung infections are at risk for bronchiectasis. Such conditions include:
Bronchiectasis can develop at any age. Overall, two-thirds of people who have the condition are women. However, in children, the condition is more common in boys than in girls.
The initial airway damage that leads to bronchiectasis often begins in childhood. However, signs and symptoms may not appear until months or even years after you start having repeated lung infections.
The most common signs and symptoms of bronchiectasis are:
If your doctor listens to your lungs with a stethoscope, he or she may hear abnormal lung sounds.
Over time, you may have more serious symptoms. You may cough up blood or bloody mucus and feel very tired. Children may lose weight or not grow at a normal rate.
Respiratory failure is a condition in which not enough oxygen passes from your lungs into your blood. The condition also can occur if your lungs can't properly remove carbon dioxide (a waste gas) from your blood.
Respiratory failure can cause shortness of breath, rapid breathing, and air hunger (feeling like you can't breathe in enough air). In severe cases, signs and symptoms may include a bluish color on your skin, lips, and fingernails; confusion; and sleepiness.
Atelectasis is a condition in which one or more areas of your lungs collapse or don't inflate properly. As a result, you may feel short of breath. Your heart rate and breathing rate may increase, and your skin and lips may turn blue.
If bronchiectasis is so advanced that it affects all parts of your airways, it may cause heart failure. Heart failure is a condition in which the heart can't pump enough blood to meet the body's needs.
The most common signs and symptoms of heart failure are shortness of breath or trouble breathing, tiredness, and swelling in the ankles, feet, legs, abdomen, and veins in the neck.
Your doctor may suspect bronchiectasis if you have a daily cough that produces large amounts of sputum (spit).
To find out whether you have bronchiectasis, your doctor may recommend tests to:
A chest computed tomography (to-MOG-ra-fee) scan, or chest CT scan, is the most common test for diagnosing bronchiectasis.
This painless test creates precise pictures of your airways and other structures in your chest. A chest CT scan can show the extent and location of lung damage. This test gives more detailed pictures than a standard chest x ray.
This painless test creates pictures of the structures in your chest, such as your heart and lungs. A chest x ray can show areas of abnormal lung and thickened, irregular airway walls.
Your doctor may recommend other tests, such as:
If your bronchiectasis doesn't respond to treatment, your doctor may recommend bronchoscopy (bron-KOS-ko-pee). Doctors use this procedure to look inside the airways.
During bronchoscopy, a flexible tube with a light on the end is inserted through your nose or mouth into your airways. The tube is called a bronchoscope. It provides a video image of your airways. You'll be given medicine to numb your upper airway and help you relax during the procedure.
Bronchoscopy can show whether you have a blockage in your airways. The procedure also can show the source of any bleeding in your airways.
Bronchiectasis often is treated with medicines, hydration, and chest physical therapy (CPT). Your doctor may recommend surgery if the bronchiectasis is isolated to a section of lung or you have a lot of bleeding.
The goals of treatment are to:
Early diagnosis and treatment of bronchiectasis may help prevent further lung damage.
Your doctor may prescribe antibiotics, bronchodilators, expectorants, or mucus-thinning medicines to treat bronchiectasis.
Antibiotics are the main treatment for the repeated lung infections that bronchiectasis causes. Oral antibiotics often are used to treat these infections.
For hard-to-treat infections, your doctor may prescribe intravenous (IV) antibiotics. These medicines are given through an IV line inserted into your arm. Your doctor may help you arrange for a home care provider to give you IV antibiotics at home.
Bronchodilators relax the muscles around your airways. This helps open your airways and makes breathing easier. Most bronchodilators are inhaled medicines. You will use an inhaler or a nebulizer to breathe in a fine mist of medicine.
Inhaled bronchodilators work quickly because the medicine goes straight to your lungs. Your doctor may recommend that you use a bronchodilator right before you do CPT.
Your doctor may prescribe expectorants and mucus thinners to help you cough up mucus.
Expectorants help loosen the mucus in your lungs. They often are combined with decongestants, which may provide extra relief. Mucus thinners, such as acetylcysteine, loosen the mucus to make it easier to cough up.
For some of these treatments, little information is available to show how well they work.
Drinking plenty of fluid, especially water, helps prevent airway mucus from becoming thick and sticky. Good hydration helps keep airway mucus moist and slippery, which makes it easier to cough up.
CPT also is called physiotherapy (FIZ-e-o-THER-ah-pe) or chest clapping or percussion. This technique involves pounding your chest and back over and over with your hands or a device. Doing this helps loosen the mucus from your lungs so you can cough it up.
You can sit with your head tilted down or lie on your stomach with your head down while you do CPT. Gravity and force help drain the mucus from your lungs.
Some people find CPT hard or uncomfortable to do. Several devices can help with CPT, such as:
Some of these methods and devices are popular with patients and doctors, but little information is available on how well they actually work. Choice usually is based on convenience and cost.
Several breathing techniques also are used to help move mucus to the upper airway so it can be coughed up. These techniques include forced expiration technique (FET) and active cycle breathing (ACB).
FET involves forcing out a couple of breaths and then doing relaxed breathing. ACB is FET that involves deep breathing exercises.
Depending on your condition, your doctor also may recommend oxygen therapy or surgery to remove a section of your lung.
Oxygen therapy can help raise low blood oxygen levels. For this treatment, you'll receive oxygen through nasal prongs or a mask. Oxygen therapy can be done at home, in a hospital, or in another health facility. (For more information, go to the Health Topics Oxygen Therapy article.)
Your doctor may recommend surgery if no other treatments have helped and only one part of your airway is affected. If you have major bleeding in your airway, your doctor may recommend surgery to remove part of your airway or a procedure to control the bleeding.
To prevent bronchiectasis, it's important to prevent the lung infections and lung damage that can cause it.
Childhood vaccines for measles and whooping cough prevent infections related to these illnesses. These vaccines also reduce complications from these infections, such as bronchiectasis.
Avoiding toxic fumes, gases, smoke, and other harmful substances also can help protect your lungs.
Proper treatment of lung infections in children also may help preserve lung function and prevent lung damage that can lead to bronchiectasis.
Stay alert to keep children (and adults) from inhaling small objects (such as pieces of toys and food that might stick in a small airway). If you think you, your child, or someone else has inhaled a small object, seek prompt medical care.
Early diagnosis and treatment of bronchiectasis can prevent further damage to your lungs. People who have bronchiectasis should have ongoing care and try to follow a healthy lifestyle.
If you have bronchiectasis, work closely with your doctor to learn how to improve your quality of life. This involves learning as much as you can about bronchiectasis and any underlying conditions that you have.
Take steps to avoid lung infections. Ask your doctor about getting flu and pneumonia vaccines. Wash your hands often to lower your risk of getting viruses and bacterial infections.
Following a healthy lifestyle is important for overall health and well-being. For example, if you smoke, try to quit. Smoking harms nearly every organ in your body, including your lungs.
Talk with your doctor about programs and products that can help you quit smoking. Also, try to avoid secondhand smoke.
If you have trouble quitting smoking on your own, consider joining a support group. Many hospitals, workplaces, and community groups offer classes to help people quit smoking.
For more information about how to quit smoking, go to the Health Topics Smoking and Your Heart article and the National Heart, Lung, and Blood Institute's (NHLBI's) "Your Guide to a Healthy Heart." Although these resources focus on heart health, they include general information about how to quit smoking.
You also can protect your airways by avoiding toxic fumes, gases, and other harmful substances.
A healthy lifestyle also involves following a healthy diet. A healthy diet includes a variety of vegetables and fruits. It also includes whole grains, fat-free or low-fat dairy products, and protein foods, such as lean meats, poultry without skin, seafood, processed soy products, nuts, seeds, beans, and peas.
A healthy diet is low in sodium (salt), added sugars, solid fats, and refined grains. Solid fats are saturated fat and trans fatty acids. Refined grains come from processing whole grains, which results in a loss of nutrients (such as dietary fiber).
Staying hydrated also is important. Drinking plenty of fluids, especially water, helps prevent airway mucus from becoming thick and sticky.
For more information about following a healthy diet, go to the NHLBI's "Your Guide to Lowering Your Blood Pressure With DASH" and the U.S. Department of Agriculture's ChooseMyPlate.gov Web site. Both resources provide general information about healthy eating.
Try to be as physically active as you can. Physical activity, such as walking and swimming, can help loosen mucus. Ask your doctor what types and amounts of activity are safe for you.
The National Heart, Lung, and Blood Institute (NHLBI) is strongly committed to supporting research aimed at preventing and treating heart, lung, and blood diseases and conditions and sleep disorders.
NHLBI-supported research has led to many advances in medical knowledge and care. Often, these advances depend on the willingness of volunteers to take part in clinical trials.
Clinical trials test new ways to prevent, diagnose, or treat various diseases and conditions. For example, new treatments for a disease or condition (such as medicines, medical devices, surgeries, or procedures) are tested in volunteers who have the illness. Testing shows whether a treatment is safe and effective in humans before it is made available for widespread use.
By taking part in a clinical trial, you can gain access to new treatments before they're widely available. You also will have the support of a team of health care providers, who will likely monitor your health closely. Even if you don't directly benefit from the results of a clinical trial, the information gathered can help others and add to scientific knowledge.
If you volunteer for a clinical trial, the research will be explained to you in detail. You'll learn about treatments and tests you may receive, and the benefits and risks they may pose. You'll also be given a chance to ask questions about the research. This process is called informed consent.
If you agree to take part in the trial, you'll be asked to sign an informed consent form. This form is not a contract. You have the right to withdraw from a study at any time, for any reason. Also, you have the right to learn about new risks or findings that emerge during the trial.
For more information about clinical trials related to bronchiectasis, talk with your doctor. You also can visit the following Web sites to learn more about clinical research and to search for clinical trials:
For more information about clinical trials for children, visit the NHLBI's Children and Clinical Studies Web page.
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.