Headache, chest tightness, shortness of breath and breathlessness are mainly due to three reasons: First, coronary heart disease, patients need to be asked whether they have a past history of coronary heart disease, if there is cardiac insufficiency, patients can have chest tightness, shortness of breath and breathlessness after activity, accompanied by dizziness and headache, and the symptoms can be relieved after taking nitrate drugs or rest. Second, chronic obstructive pulmonary disease, when the lung function is seriously impaired, the patient may have chest tightness, shortness of breath and breathlessness after activity, accompanied by dizziness and headache. Third, whether the patient has symptoms of cardiac neurosis, it is necessary to exclude organic lesions of the heart and lungs before diagnosis. In addition to chest tightness, shortness of breath and breathlessness, the patient will also have other somatic discomfort, such as numbness, insect crawling sensation and other symptoms, and there is no obvious trigger for the onset of symptoms, and all tests are normal.