The common causes of rumbling in breathing and coughing are bronchial asthma, chronic heart failure and bronchial space-occupying lesions. 1. Bronchial asthma: When patients are exposed to allergens such as pollen, animal dander and willow flakes, it can cause bronchial smooth muscle spasms, which can lead to breathing with a rumbling sound. Coughing can help cilia movement, coughing up the secretions of the airways, so cough a little better. 2. Chronic heart failure: chronic heart failure patients will have pulmonary stasis, resulting in increased secretions in the alveoli, and may cause trachea and bronchial tubes in a state of spasm, respiratory rales. When you cough, you can vibrate the bronchial tubes, so that the bronchial tubes are temporarily dilated, and the breathing is transiently smooth, so you will feel better. 3. Bronchial space-occupying lesions: such as bronchial polyps and bronchial tumors and other bronchial lesions, because there are superfluous organisms in the bronchial tubes, which can cause bronchial obstruction, so there will be a croupy sound when you breathe. Coughing helps to stimulate the smooth muscle activity of the bronchial tubes, pulling on the activity of the redundant organisms and providing temporary relief from the bronchial obstruction. If you have a rumbling sound when breathing, it is recommended that you go to a regular hospital in time to get a clear diagnosis, receive professional treatment, and follow the doctor’s instructions for medication.