There are many reasons for the shortage of breath, as follows: 1. Staying in a closed, airless room for a long time, the respiratory circulation in the human body is easily affected, and this time there may be chest tightness and shortness of breath. 2. 3. cervical spondylosis, prolonged playing with cell phones and computers, cervical nerves are compressed and cervical spondylosis occurs. Related research shows that some patients with cervical spondylosis are prone to chest tightness and shortness of breath in normal times.4. Respiratory obstruction or pulmonary diseases, such as tracheal stenosis, external pressure on the trachea (goiter) or emphysema, bronchitis, asthma, pneumothorax, etc., need timely hospital consultation and symptomatic treatment.5. Cardiovascular disease, heart disease often has the following symptoms, such as the heart appears coronary artery Atherosclerotic heart disease, unstable angina or myocarditis, pericarditis, endocarditis, cardiac insufficiency will often have chest tightness, shortness of breath along with palpitations and always want to take a deep breath when talking. In addition, cardiac neurosis may also have the above clinical symptoms and manifestations.