The symptoms of panic, shortness of breath or pain in the precordial region during pregnancy are caused by the following details: 1. First of all, pregnant women should be considered throughout pregnancy, because the maternal blood volume increases significantly compared with that of the unpregnant, especially the increase of plasma over the increase of red blood cells, the physiological anemia during pregnancy appears, so that the ability of blood to carry oxygen decreases significantly, then the symptoms of panic, shortness of breath or chest discomfort appear; 2. After pregnancy, gradually The enlarged uterus can push the diaphragm upward, so that the heart is pushed to the left and upward, resulting in a smaller chest cavity, which affects the heart and lung activities and increases the burden on the heart, resulting in the symptoms of panic and shortness of breath. Pregnant women with symptoms of panic and shortness of breath during pregnancy generally do not need to worry. If the symptoms are very obvious or there is pain in the precordial area, you should seek medical attention promptly, and if necessary, you can have an electrocardiogram, echocardiogram, or even ask a cardiologist for further evaluation; 3. If pathological causes lead to panic, shortness of breath or pain in the precordial area, you need to seek medical attention promptly.