Sometimes light and sometimes heavy dyspnea needs to be treated according to the causes, such as mental factors, infectious factors, bronchial asthma, chronic obstructive pulmonary disease, pulmonary embolism, etc. After a clear diagnosis, general treatment and medication should be chosen according to the causes. 1. Psychological factors: patients with long-term mental tension, anxiety, depression, excessive pressure, can cause dyspnea sometimes light and sometimes heavy phenomenon. This phenomenon does not require special treatment, should need to do a good job of self-regulation, usually after relaxing mood relief. 2. Infectious factors: bronchitis, pneumonia, bronchitis, etc., can also cause dyspnea sometimes light and sometimes heavy. Treatment can be prescribed antibiotics, such as levofloxacin, roxithromycin and so on. 3. Bronchial asthma: bronchial spasm due to hyperreactivity, resulting in dyspnea sometimes mild and sometimes severe. Treatment can use aminophylline, salbutamol and other drugs to improve the symptoms. 4. Chronic Obstructive Pulmonary Disease (COPD): due to chronic inflammation stimulation, it will cause dyspnea sometimes mild and sometimes severe. For treatment, Budesonide and ipratropium bromide can be used as prescribed by the doctor. 5. Pulmonary embolism: pulmonary embolism can also cause dyspnea sometimes light and sometimes heavy phenomenon, can follow the doctor’s advice to use warfarin, low molecular heparin for anticoagulation thrombolytic therapy. There are many reasons for dyspnea, we suggest that patients go to the hospital in time to improve the examination, and take standardized treatment according to the doctor’s instructions, do not ignore the symptoms, take it lightly, and delay the condition.