Obstructive Bronchitis: What It Is, Symptoms and Causes

The diagnosis of "obstructive bronchitis" means narrowing of the bronchial lumen due to swelling of the mucosa, not a separate disease with a different name. Let's calmly break down what obstruction is, how it feels, and at what point a conversation about a cough stops being routine.

What obstructive bronchitis and bronchial obstruction are

The bronchi are cartilaginous tubes that carry air from the trachea to the pulmonary alveoli. Bronchitis is inflammation of their mucous membrane; unlike pneumonia, the alveoli are not affected. In some cases the lumen of the tubes becomes blocked due to swelling of the mucosa — such blockage is called obstruction, and doctors call bronchitis with obstructive syndrome obstructive.

Causes of acute and allergic obstructive bronchitis

Acute obstructive bronchitis is in most cases caused by infection. The main culprits are respiratory viruses, primarily influenza. Bacteria are encountered much less often. The disease is contagious and occurs more often in the winter months.

In chronic bronchitis the cause is different — many years of exposure to irritants. Smoking is the cause of most cases: among people with chronic bronchitis, up to 75% smoke or used to smoke, and overall tobacco accounts for more than 90% of cases. Next come passive smoking, polluted air, chemical vapors and dust in the workplace, and rarely hereditary alpha-1 antitrypsin deficiency. Allergy and asthma are also among the risk factors for both acute and chronic bronchitis.

Symptoms of obstructive bronchitis and obstructive cough

The main symptom is cough. At first the cough may be without sputum; later sputum appears: clear, white, yellowish-gray or green, rarely with streaks of blood. With obstruction, wheezing breathing appears.

• cough with or without sputum;
• wheezing;
• shortness of breath and a feeling of tightness in the chest;
• burning pain behind the sternum when breathing and coughing;
• fatigue, mild fever, chills.

A time reference: acute bronchitis is defined as a cough with sputum that lasts no more than 3 weeks, and it usually resolves on its own in about that time. If the cough persists longer than 3 weeks, the doctor considers other causes — for example, post-infectious cough.

Obstructive bronchitis in a child and in adults

Acute bronchitis is more often viral in people of any age. Children under 4 years old with a cough should be seen by a doctor right away. In adults, shortness of breath is more characteristic of chronic bronchitis, whose symptoms usually first appear after age 40, and smoking remains the leading factor.

How obstructive bronchitis is diagnosed

The doctor begins with questions: how long the cough has lasted, whether there is sputum, whether the person smokes, what illnesses they had before, whether there are family cases of COPD, asthma, allergy. Next come an examination and tests: pulmonary function testing, X-ray or computed tomography of the chest, blood tests. Imaging is needed to rule out pneumonia: acute bronchitis is characterized by the absence of infiltrates in the lungs. Rapid breathing, shortness of breath and tachycardia are concerning — they may indicate pneumonia.

Possible complications and when a doctor is needed

In chronic bronchitis, inflammation progresses over time, and in severe cases weight loss, weakness of the leg muscles, and swelling of the feet and ankles appear. A cough lasting longer than 3 weeks, blood in the sputum, chest pain when breathing and coughing, shortness of breath, fever, and a general feeling that things have become too bad for ordinary activities are reasons to see a doctor. Particular attention is required for people over 65, pregnant women, people with diabetes, heart, lung or kidney disease, and those with weakened immunity.

Obstructive bronchitis by itself is not a reason to call an ambulance; 103/112 — if the person has difficulty breathing: they are gasping, gulping air through the mouth, unable to speak; the lips or skin have become very pale, blue or gray; the person has suddenly stopped understanding where they are; the infant does not wake up or has gone limp.

This article is for reference: it helps to understand what is happening and what to ask the doctor, but does not replace an examination — the final answer always rests with the specialist.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer