There are many reasons why running dyspnea is hard on the lungs, and it may be caused by neurosis, bronchial asthma, emphysema and other diseases. 1. Neurosis: it is a general term for a series of mental disorders, which can lead to running dyspnea when the condition is serious. During the treatment, you need to pay attention to life adjustment, keep enough sleep, and psychological enlightenment, and actively eliminate doubts. 2. Bronchial asthma: it is a bronchial disease, mainly manifested as repeated wheezing and shortness of breath, and these patients will suddenly experience dyspnea and difficult lungs when running or exercising. If they belong to the acute attack period, they should strictly follow the doctor’s instructions to use medicines, such as inhalation budesonide, terbutaline and so on. 3. Emphysema: It is mainly due to the damage of alveoli, resulting in the increase of lung volume, so the patient will have dyspnea symptoms when running. About this disease need to be hospitalized as soon as possible to observe, and follow the doctor’s instructions to give dexamethasone inhalation nebulization treatment. There are many reasons why running dyspnea is hard on the lungs, so it is recommended to go to the hospital in time to clarify the cause of the disease, and treat it under the guidance of the doctor.