Frequent sighing may be related to physiological and pathological factors, such as depression, emphysema, heart failure and other factors. 1. Physiological: When you are tired at work, overthinking or moping in your heart, which leads to serious negative emotions, you will feel bad breathing, thus causing sighing, which is a normal physiological phenomenon. 2. Pathological: (1) depression: depressed patients with a long period of low mood, depression and pessimism, slow thinking, reduced will activity, emotional state of mind can not be relieved, low self-evaluation, long time gas attack lead to frequent sighing. (2) Emphysema: Emphysema is a respiratory disease, which can be manifested as damage to the air sacs or alveoli in the lungs. Due to this type of damage, the bronchial tubes collapse, resulting in air stagnation in the lungs, so the patient will experience frequent sighing. (3) Heart failure: due to improper blood circulation between the heart and lungs, pulmonary stasis and decreased cardiac output cause weakness, fatigue, dizziness, panic, etc., and the phenomenon of sighing occurs. When the patient sighs frequently and has the above symptoms, he/she should go to the hospital for diagnosis and treatment in time.