There are many causes of coughing, commonly found in respiratory system diseases, digestive system diseases, cardiovascular system diseases and so on. You can consult respiratory medicine, gastroenterology, cardiology. 1. Respiratory medicine: cough is one of the first manifestations of most respiratory diseases, so cough is always bad, you can first consider consulting respiratory medicine. 2. Gastroenterology: If you have a cough, accompanied by heartburn and acid reflux, consider hanging up on digestive diseases. 3. Cardiology: If you have shortness of breath with cough after activity, consider cardiology. There are many reasons why you may have a bad cough. You should go to the hospital as soon as possible to clarify the cause of the cough and get appropriate treatment under the guidance of your doctor, or consult the medical desk if necessary.