Bronchitis, also called acute bronchitis, the recovery period will appear in the examination of the lungs without dry rales, etc., and the lung imaging is not special, or show increased lung texture. 1 Clinical manifestations: bronchitis is mainly caused by bacterial infection. During the recovery period, there will be relief of symptoms such as dyspnea, wheezing (wheezing shortness of breath), dyspnea, etc., and the clinical signs are basically reduced or disappeared. 2. Lung auscultation: dry rales, wheezing sounds or small wet rhonchi can be heard on lung auscultation during the recovery period. 3. Auxiliary examination: blood routine is not obvious abnormality, and the classification of white blood cells is generally normal. Chest radiography is not special, or may show enhanced lung texture, peribronchial inflammation, and some patients may have scattered speckled, punctate, or streak-like dense shadows. If the above symptoms occur, you should go to the hospital immediately for examination and treatment under the guidance of the doctor.