The medical term for breathlessness is called dyspnea, and the most common causes of dyspnea are pulmonary and cardiac, in addition to some systemic factors, such as kidney disease, anemia, and uremia. In addition, there are toxic factors, such as the use of some poisons, eating chicken with poisons in it, which can also lead to the condition of breathlessness. The most common core causes of lung are diseases of the respiratory system, common ones such as chronic bronchial, chronic asthma, chronic pneumonia, chronic obstructive pulmonary disease, lung cancer, all of which can cause dyspnea and inability to breathe. Heart diseases such as optic failure, pericarditis, myocardial infarction leading to pulmonary edema can also cause dyspnea and breathlessness. Therefore, breathlessness is a very non-specific symptom, and it is not possible to decide which disease the patient is suffering from based on the symptoms, but rather the patient’s physical examination and ancillary tests should be combined to finally determine what the cause is.