Feeling short of breath while eating may be caused by circulatory system diseases, respiratory system diseases and other reasons. 1. Circulatory system diseases: usually for patients with coronary heart disease and other heart diseases, when food enters the gastrointestinal tract, blood will gradually concentrate in the gastrointestinal tract area, resulting in a relative lack of blood supply to the heart, which may lead to shortness of breath while eating. 2. Respiratory diseases: generally for patients suffering from chronic obstructive pulmonary disease, chronic bronchitis, pneumothorax and other respiratory diseases, there will be breathing problems, which may lead to shortness of breath during meals. There are many other causes of shortness of breath while eating, and it is recommended that patients actively seek medical attention to clarify the cause of the disease and then carry out regular treatment.