Bronchitis is a respiratory infection that affects the bronchial tubes, which carry air to and from the lungs. It is often caused by a viral infection, such as the common cold or influenza. Less commonly, it can be caused by bacteria or other irritants.

Causes of bronchitis infection:

1. Viral infections: Most cases of bronchitis are caused by viral infections, such as the influenza virus or the common cold virus.

2. Bacterial infections: In some cases, bacterial infections can cause bronchitis. This is more common in people with weak immune systems or those who have other underlying health conditions.

3. Environmental factors: Exposure to certain irritants, such as tobacco smoke, air pollution, or chemical fumes, can also cause bronchitis. This is more commonly seen in individuals who are exposed to these irritants on a regular basis, such as smokers or those who work in certain industries.

Treatment for bronchitis infection:

1. Rest and hydration: Resting and drinking plenty of fluids can help the body fight off the infection and relieve symptoms.

2. Over-the-counter medications: Nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, can help relieve pain and reduce inflammation. Cough suppressants may also be used to help alleviate coughing.

3. Bronchodilators: In some cases, bronchodilators may be prescribed to help open the airways and improve breathing.

4. Antibiotics: If the bronchitis infection is caused by bacteria, antibiotics may be prescribed. However, antibiotics are not effective against viral infections.

5. Inhalers: Inhaled medications, such as corticosteroids, may be prescribed to reduce inflammation in the airways and improve breathing.

6. Avoiding irritants: It is important to avoid exposure to irritants, such as cigarette smoke or chemical fumes, as these can worsen symptoms and prolong the healing process.

It is important to note that most cases of bronchitis will resolve on their own within a week to 10 days. However, if symptoms persist or worsen, it is important to seek medical attention for further evaluation and treatment.