Persistent Cough for Two Weeks: What Could Be the Cause? - Internal Medicine

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A persistent cough lasting for two weeks can be concerning, especially if it is accompanied by other symptoms. In your case, you mentioned that the cough is dry (without phlegm) and that you have white nasal discharge. While it is understandable to worry about potential lung issues, there are several possible causes for your symptoms that may not necessarily indicate a serious problem.

1. Viral Infections: The most common cause of a persistent cough, especially following a cold or flu, is a viral infection. After the initial viral infection, it is not uncommon for a cough to linger for weeks, even after other symptoms have resolved. This is often due to inflammation in the airways that takes time to heal.

2. Post-Nasal Drip: If you are experiencing nasal discharge, it could be that mucus is dripping down the back of your throat, which can trigger a cough reflex. This is known as post-nasal drip and is often associated with allergies or sinus infections.

3. Allergies: Allergic reactions can cause a persistent cough, especially if you are exposed to allergens such as pollen, dust, or pet dander. Allergies can lead to inflammation in the airways and result in coughing.

4. Asthma: Although you mentioned that you have no history of smoking, asthma can develop at any age. It is characterized by wheezing, shortness of breath, and coughing, particularly at night or early in the morning. If you notice that your cough worsens with exercise or exposure to cold air, it may be worth discussing asthma with your healthcare provider.

5. Gastroesophageal Reflux Disease (GERD): GERD can cause a chronic cough due to acid irritating the throat and airways. If you experience heartburn or a sour taste in your mouth, this could be a contributing factor.

6. Environmental Irritants: Exposure to irritants such as smoke, strong odors, or pollution can lead to a persistent cough. Even if you do not smoke, being around others who do or living in a polluted area can affect your respiratory health.

Given that your cough has persisted for two weeks, it is advisable to consult with a healthcare professional. They may recommend a physical examination, and possibly tests such as a chest X-ray or pulmonary function tests, to rule out more serious conditions like pneumonia or chronic bronchitis.
In the meantime, here are some general recommendations that may help alleviate your symptoms:
- Stay Hydrated: Drinking plenty of fluids can help thin mucus and soothe an irritated throat.

- Humidify the Air: Using a humidifier can add moisture to the air, which may help ease coughing.

- Avoid Irritants: Try to stay away from smoke, strong perfumes, and other irritants that could exacerbate your cough.

- Consider Over-the-Counter Remedies: Depending on your symptoms, cough suppressants or antihistamines may provide relief. However, consult with a healthcare provider before starting any new medication.

In summary, while a persistent cough can be alarming, it is often due to benign causes such as viral infections, allergies, or post-nasal drip. However, if your symptoms worsen or do not improve, seeking medical advice is essential to ensure proper diagnosis and treatment.