Left chest pain in front of a black eye may be a bad symptom caused by coronary heart disease, suffering from aortic coarctation, myocardial infarction and other diseases will also appear such a situation, it is recommended to go to the hospital in time for examination. 1. Coronary heart disease: Coronary heart disease may cause left chest pain in front of the eyes a black situation, patients usually appear obvious chest tightness, palpitations and other adverse symptoms, the pain is radioactive, the left chest around the discomfort will be accompanied by excessive exertion, the symptoms will be more pronounced, the onset of fainting may cause. 2. Aortic coarctation: aortic coarctation may also lead to the symptoms of left chest pain in front of the eyes, the pain is usually stronger, the patient will also appear chest tightness, shortness of breath, limb weakness and other symptoms, the onset of the disease will lead to the patient’s face pale, sweating and other discomforts, will lead to fainting. 3. Myocardial infarction: myocardial infarction may also occur in such cases, will cause patients to appear arrhythmia, dyspnea and other adverse symptoms, the onset of the patient may cause sudden syncope or shock, serious heart failure. Such symptoms need timely medical attention, identify the cause of the disease, according to the doctor’s advice to choose the appropriate treatment, to avoid delaying the condition.