Difficulty in breathing and coughing a lot of reasons, common in pharyngitis, bronchitis, pneumonia and so on. 1. pharyngitis: pharyngitis can easily lead to pharyngeal mucosa, congestion and edema, and may also appear dry and itchy, so it will lead to dyspnea and cough a lot. 2. Bronchitis: bronchitis is usually caused by pathogenic infections, inflammation in the local repeated stimulation will lead to airway mucosal damage, there is a large amount of secretion, so that the patient appeared dyspnea cough a lot of the situation. 3. Pneumonia: Pneumonia is usually caused by viral or bacterial infections, after the disease will lead to a large number of inflammatory purulent secretions in the mucous membrane of the lungs, resulting in dyspnea and coughing a lot. Dyspnea can also be seen in other diseases, such as asthma, chronic obstructive pulmonary disease, etc. It is recommended that patients consult a doctor in a timely manner to determine the cause of the disease and standardize the treatment under the guidance of the doctor.