What are the symptoms of bronchitis?
Jun 30, 2026
Source: Cainiu Health
Dr. Li Feng
Introduction
In general, common symptoms of bronchitis include frequent coughing, persistent expectoration, chest tightness and shortness of breath, dryness and itching in the throat, and mild fever. If any discomfort occurs, it is advisable to seek timely medical evaluation and treatment at a reputable hospital. Additionally, bronchitis may also present with systemic symptoms such as fatigue and decreased appetite. In daily life, proper respiratory protection should be practiced, and exposure to dust and irritant gases should be avoided.
Generally, common symptoms of bronchitis include frequent coughing, persistent phlegm production, chest tightness and shortness of breath, dry or itchy throat, and mild fever. If any of these symptoms occur, it is advisable to seek timely medical evaluation and treatment at a reputable hospital. A detailed analysis follows:
1. Frequent Coughing
Frequent coughing is a hallmark symptom of bronchitis. In the early stage, the cough is typically non-productive (dry), gradually becoming productive with phlegm as the disease progresses. When the bronchi are irritated by pathogens, cold air, or dust particles, inflammatory damage occurs in the airway mucosa, increasing airway neural sensitivity and repeatedly triggering the body’s cough reflex—resulting in persistent coughing.
2. Persistent Phlegm Production
Persistent phlegm production reflects ongoing airway secretion. Initially, the sputum is usually white and mucoid; however, as infection worsens, it may turn yellow and purulent. During bronchial inflammation, mucosal glands significantly increase their secretory activity, generating large volumes of inflammatory exudate that accumulate within the airways. The body expels this accumulated secretion via coughing.
3. Chest Tightness and Shortness of Breath
Chest tightness and shortness of breath often worsen with physical activity and are accompanied by a sensation of breathing difficulty. Inflammation causes congestion and edema of the bronchial mucosa, narrowing the airway lumen and impeding airflow—thereby reducing pulmonary ventilation and leading to chest tightness and tachypnea.
4. Dry or Itchy Throat
A dry or itchy throat manifests as dryness and pruritus in the pharyngeal region, often provoking paroxysmal coughing. Inflammatory stimuli originating in the bronchi may extend upward to involve the pharynx, causing mild mucosal congestion and dryness, which continuously irritate pharyngeal nerves and induce discomfort.
5. Mild Fever
Mild fever typically presents as low-grade fever, with some individuals experiencing recurrent fluctuations in body temperature. Inflammatory infection in the bronchi activates the immune system; during the immune response against pathogens, systemic low-grade fever may develop, sometimes accompanied by generalized fatigue.
In addition, bronchitis may also cause systemic symptoms such as fatigue and decreased appetite. In daily life, individuals should take precautions to protect the respiratory tract—avoiding exposure to dust and irritating gases, drinking ample warm water to maintain airway moisture, ensuring adequate warmth, and undergoing regular respiratory health check-ups. Early detection and prompt treatment are essential to prevent chronicity or recurrent episodes.
