A cough that lasts a few days is common after a cold, the flu, or a seasonal viral infection. However, when coughing continues for weeks, disrupts your sleep, or leaves you feeling constantly short of breath, it moves beyond a simple inconvenience. A persistent cough is one of the most common reasons patients seek medical care, and understanding why it won’t go away is the first step toward finding relief.

What Is a Chronic Cough?

In adults, a cough lasting eight weeks or longer is clinically defined as a chronic cough. While a short-term cough usually resolves as your body fights off an infection, a chronic cough indicates that an ongoing irritant or medical condition is affecting your respiratory tract.

Common causes of a chronic cough include:

• Asthma: Cough-variant asthma may present primarily as a dry cough, often triggered by exercise, cold air, or exposure to allergens.
• Postnasal Drip (Upper Airway Cough Syndrome): Excess mucus produced by allergies or sinus infections drips down the back of the throat, triggering a persistent cough reflex.
• Gastroesophageal Reflux Disease (GERD): Stomach acid flowing back into the esophagus can irritate the throat and micro-aspirate into the airways, leading to chronic throat clearing and coughing.
• Chronic Obstructive Pulmonary Disease (COPD) & Chronic Bronchitis: Ongoing inflammation of the bronchial tubes, often linked to smoking or long-term environmental exposure, produces persistent mucus and coughing.
• Medication Side Effects: Certain common blood pressure medications, particularly ACE inhibitors, are well-known causes of a dry, hacking chronic cough.
• Environmental Irritants: Exposure to second-hand smoke, industrial fumes, chemical dust, or poor indoor air quality can keep airways constantly inflamed.

Signs You Should Schedule an Evaluation

It is easy to dismiss a lingering cough as the tail end of a cold, but ignoring persistent respiratory symptoms can allow underlying conditions to progress. You should schedule an evaluation with a healthcare provider if your cough:

• Lasts longer than three to four weeks without improvement
• Produces thick, discolored, or foul-smelling mucus
• Comes with wheezing, chest tightness, or difficulty catching your breath
• Disrupts your sleep or causes chest muscle soreness
• Is accompanied by unexplained weight loss, night sweats, or fatigue
• Produces any traces of blood

If you have a history of asthma, COPD, smoking, or recurrent chest infections, early medical evaluation is especially critical.

How Pulmonary Testing Can Help

Because a chronic cough can stem from multiple different body systems, accurate diagnosis requires a structured approach. Rather than relying on over-the-counter cough suppressants that only mask symptoms, a pulmonary evaluation pinpoints the underlying cause.

Diagnostic tools and evaluations may include:

• Spirometry & Pulmonary Function Tests (PFTs): Non-invasive breathing tests that measure how much air your lungs can hold and how quickly you can exhale, helping identify airway obstruction or restriction.
• FeNO Testing: Measures nitric oxide levels in your breath to check for allergic airway inflammation associated with asthma.
• Imaging: Chest X-rays or CT scans to check for lung inflammation, infection, or structural changes.
• Medication & Trigger Review: A comprehensive review of your prescriptions and environmental exposures to identify potential triggers.

Getting Answers Matters

The primary goal of a pulmonary evaluation is not just to quiet the cough—it is to address the root cause. Treating underlying asthma, managing reflux, or adjusting medications can eliminate the cough entirely and protect your long-term lung function.

Pulmonary & Medicine Associates PLLC provides specialized pulmonary evaluation, diagnostic testing, and comprehensive lung care in Warren, Michigan. If a persistent cough is interfering with your daily life, contact our office to schedule a consultation.

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