Long inhalation and short exhalation is generally pointed out that the breath is not smooth, difficult to breathe the feeling, may be caused by coronary heart disease, chronic obstructive pulmonary disease, cardiomyopathy and other reasons, the specific causes need to go to the hospital to determine the examination. 1. Coronary heart disease: long inhalation and exhalation of short and accompanied by chest pressure, chest pain and other symptoms, may be caused by dyslipidemia, obesity, heredity and other factors, when the heart pumps blood can not meet the body’s needs, in the exertion of inhalation and exhalation of long and short situation will occur. 2. Chronic Obstructive Pulmonary Disease (COPD): shortness of breath with coughing up phlegm, coughing and wheezing may be caused by heredity, lung growth and development, and long-term smoking, etc. There is excessive residual gas in the lungs of the patients, which will have a certain impact on the respiratory function, thus leading to shortness of breath in inhalation and exhalation. 3. Cardiomyopathy: Short inspiration and short expiration with chest pain and other symptoms may be caused by nutritional deficiencies, viral infections, and prolonged heavy drinking, etc. Short inspiration and short expiration will occur when the patient is engaged in physical activities. There are many other causes of shortness of breath, such as asthma, pleurisy, pleural effusion and other diseases, symptoms should be promptly to the hospital for medical treatment.