Acute bronchitis is not serious in most cases and can be improved with treatment; however, a few patients may develop comorbidities that can lead to serious consequences. Acute bronchitis is mostly caused by viral, bacterial, mycoplasma and other pathogenic infections. The main manifestation is coughing, which can usually be gradually recovered through anti-infective treatment and symptomatic treatment to stop coughing, and the condition is not serious. Physical and chemical stimuli may also lead to non-infectious acute bronchitis, usually symptomatic treatment and other treatments can also be recovered, the condition is not serious. However, in a few cases, acute bronchitis is combined with pneumonia or even respiratory failure, which are relatively more serious and need to be treated actively to avoid delaying the condition. Therefore, acute bronchitis needs timely medical treatment and active management.