What is the difference between acute bronchitis and bronchitis? Generally speaking, in terms of the duration of the disease, bronchitis can be classified into acute bronchitis and chronic bronchitis. Acute bronchitis is a type of bronchitis. It is often caused by infections, physical and chemical factors, allergies, etc. Patients may experience fever, cough, and expectoration, and the duration usually lasts 2 to 3 weeks. In the case of chronic bronchitis, the course of the disease is longer, with symptoms such as repeated coughing, expectoration, and wheezing, and the symptoms persist and do not improve.