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What is Bronchiolitis?
Bronchiolitis is a viral infection that causes the airways (bronchioles) in the lungs to become narrow, which makes breathing difficult. It occurs most often in children under age 2 during winter and early spring.
Very rarely, adults can get bronchiolitis. For instance, there is a condition called bronchiolitis obliterans, which is sometimes known as “popcorn lung.” This condition is usually caused by breathing in irritating chemicals or other substances.
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Get A Second OpinionTypes of Bronchiolitis
Viral Bronchiolitis
Viral bronchiolitis appears in infants. Most cases of viral bronchiolitis are due to respiratory syncytial virus (RSV). Viral outbreaks occur every winter and affect children under the age of one.
Bronchiolitis Obliterans
Bronchiolitis obliterans is a rare and dangerous condition seen in adults. This disease causes scarring in the bronchioles. This blocks the air passages creating an airway obstruction that can’t be reversed.
Symptoms
Viral bronchiolitis and bronchiolitis obliterans have similar signs and symptoms. These include:
- Shortness of breath
- Wheezing
- Bluish appearance of the skin from lack of oxygen
- Crackling or rattling sounds heard in the lungs
- Fatigue
- Ribs that appear sunken during attempts to inhale (in children)
- Nasal flaring (in babies)
- Fast breathing
- Cough
Exposure to certain chemicals may cause bronchiolitis to appear within two weeks to a month. A lung infection can take several months to several years to produce symptoms.
Causes
There are different causes of viral bronchiolitis and bronchiolitis obliterans.
Causes of Viral Bronchiolitis
Viruses that enter and infect the respiratory tract cause viral bronchiolitis. Viruses are microscopic organisms that can reproduce rapidly and challenge the immune system. The following are common types of viral infections that may cause bronchiolitis:
Respiratory Syncytial Virus (RSV)
RSV is the most common cause of bronchiolitis. RSV usually strikes children by the age of 2 but is most common in babies less than 1 year of age. Contagious infection can also cause inflammation, mucus, and swelling in the airways.
Adenoviruses
These viruses target mucous membranes. They cause about 10 percent of acute respiratory tract infections in children.
Influenza Viruses
These viruses cause inflammation in the lungs, nose, and throat. Influenza affects both adults and children. It’s especially dangerous for babies who don’t have strong immune systems.
Causes of Bronchiolitis Obliterans
This rare condition sometimes occurs for no known reason. Severe cases can lead to death if left untreated. A few cases have been identified and include:
- Fumes from chemicals like ammonia, bleach, and chlorine
- Respiratory infections
- Adverse reactions to medications
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Book an AppointmentRisks
Viral bronchiolitis can affect children up to 2 years old. It generally occurs in infants of 3 to 9 months of age. A few risk factors for viral bronchiolitis in babies and young children are:
- Not being breastfed
- Being born prematurely or born with a heart or lung condition
- Having a suppressed immune system
- Being exposed to cigarette smoke
Risks for Bronchiolitis Obliterans in Adults
- Working conditions can expose you to dangerous chemicals
- Having a heart, lung, or bone marrow transplant
- Smoking tobacco containing nicotine
- Having an autoimmune connective tissue disease
Diagnosis
There are several ways to diagnose bronchiolitis. Imaging tests, including chest X-rays that help doctors to diagnose this bronchiolitis. A common tool used for adults is spirometry.
This measures how much and how quickly you take in air with each breath. Arterial blood gas tests are used to test both types of bronchiolitis and measure how much oxygen and carbon dioxide are present in the blood.
Samples of mucus or nasal discharge can help the doctor to diagnose the type of virus causing the infection. This testing method is common with babies and small children.
Treatment
There are no specific vaccines or treatments for bronchiolitis. Antibiotics and cold medicines are not effective in treating bronchiolitis. Most cases go away on their own and can be treated at home. It is essential that your child drink plenty of fluids to avoid dehydration.
To help your baby breathe, your doctor may recommend saline nasal drops. It's also an easy approach to clear your child's nasal passages using a suction bulb. If you have a fever, your doctor may prescribe acetaminophen.
About 3% of youngsters with bronchiolitis will require hospitalization. Here the child can receive humidified oxygen and receive intravenous fluids to prevent dehydration. For more severe cases, a tube may need to be inserted into the windpipe to help the child breathe. Most children will be sent home in 2 to 8 days in the hospital.
Frequently Asked Questions
Bronchiolitis can be serious, especially in infants and young children, leading to breathing difficulties and requiring medical attention. Most cases are mild and recover with supportive care at home.
While bronchiolitis usually does not cause long-term lung damage, severe or repeated cases may increase the risk of respiratory problems later in life.
Bronchiolitis primarily affects children under the age of 2. It becomes less common as children get older because their airways become larger and more resilient.
Foods rich in antioxidants, vitamins, and minerals like fruits, vegetables, honey, garlic, and ginger can help support the immune system and reduce inflammation during bronchitis.
Rest, staying hydrated, using a humidifier, taking prescribed medications, and avoiding irritants like smoke can help speed up recovery from bronchitis.
Bronchiolitis and asthma have similar symptoms, such as wheezing and difficulty breathing, but they are different conditions. Bronchiolitis is usually caused by a viral infection, while asthma is a chronic condition involving inflammation of the airways.
Yes, steam inhalation can help relieve symptoms of bronchiolitis by loosening mucus and easing breathing. However, it should be done with caution, especially in young children, to avoid burns and excessive heat exposure.
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