Which of the following can be a symptom of bronchitis?

Chest tightness is a common symptom of bronchitis due to the inflammation of the bronchial tubes, which can lead to difficulty breathing and a sensation of pressure or constriction in the chest. This symptom arises because the bronchial passages become swollen and produce mucus, narrowing the airways and making it harder to breathe.

Other symptoms of bronchitis can include a cough, production of mucus, wheezing, and fatigue. While fever can occur with bronchitis, it is not a definitive symptom and may not always be present. Confusion and itchy eyes are not typical symptoms related to bronchitis and are more indicative of other conditions, like allergies or neurological issues. Thus, chest tightness directly relates to the pathophysiology of bronchitis and is an important characteristic for identifying the condition.