Respiratory rales may be caused by wheezing bronchitis, bronchial asthma, pneumonia and so on. 1. Wheezing bronchitis: mainly caused by viral infection, respiratory syncytial virus spreads through respiratory secretions and also through contaminated objects, resulting in the patient’s breathing with rales, accompanied by cough, fever and other symptoms. 2. Bronchial asthma: usually related to environmental and genetic factors, patients usually show recurrent attacks of wheezing, shortness of breath, chest tightness, cough and other symptoms. 3. Pneumonia: mainly caused by pathogenic microorganisms, physical and chemical factors, immune damage, allergies and drugs, resulting in patients with respiratory rales, accompanied by fever, cough, sputum and other symptoms. Respiratory rales can also be seen in chronic obstructive pulmonary disease, laryngeal edema and other conditions, it is recommended that patients go to the regular hospital in a timely manner, in the doctor’s diagnosis, according to the patient’s specific condition, to take targeted treatment.