hi, thank you for providing the brief history of your husband. A detailed examination of the chest and abdomen is advised. As he is suffering from Asthama, along with the inhaler, is her performing any breathing exercises. As in asthma, due to the pathology of the lung tissue the respiratory muscles become weak. So even after providing inhalation the symptoms of breathlessness don t subside and produce cough back to back. I will advice to do stem inhalation and also breathing exercises. Steam inhalation will help loosen the secretion of the lungs and breathing exercises will help improve the lung capacity and strengthen the muscles of respiration. Also , taking a help from a physical therapist will not be bad as they can help understand how to perform the breathing exercises . the breathing exercises include - * deep breathing exercises * abdominal breathing exercises * diaphragmatic breathing exercises * costal breathing exercises * pursed lip breathing exercises * huffing & coughing technique. in my clinical practice I see cases with breathing disorders. and by teaching them how to perform breathing exercises have helped them practice in home and optimum results are achieved. Also, a physical therapist will help you core Strengthening exercises , as core is the muscle of respiration and needs to be stronger. With all forms of breathing exercises there will be improvement in the lung capacities and ease in breathing. you can discuss the same with your pulmonogist. Regards Jay Indravadan Patel