The symptoms of dizziness in the seventh month of pregnancy are mainly considered to be caused by the following aspects: 1. Considering improper body position, caused by compression of blood vessels. The patient may have an attack while lying on the back or lying on the sofa. This is because the uterus enlarges in the late stage of pregnancy, and when the patient is lying on the side or lying down, the heavy uterus will compress the inferior vena cava at the back, resulting in the blood from the lower body not being able to return to the heart, causing a sharp decrease in the volume of returned blood, which will cause a decrease in the heart’s per-pulse output, causing insufficient cerebral blood supply of cardiogenic origin, and the patient will experience dizziness and chest tightness; 2. The patient will have dizziness, chest tightness and discomfort; 2, we should consider that it is caused by high blood pressure, because during pregnancy if the blood pressure is elevated, the patient will have dizziness, head swelling, and there will also be urinary protein, swelling of the lower limbs; 3, dizziness in the seventh month of pregnancy may also be caused by anemia.