The dyspnea of women in the 6th month of pregnancy is partly normal and partly pathological. Due to the rapid growth of the fetus, the enlarged uterus raises the diaphragm upward, resulting in a smaller chest cavity, which seriously affects the normal activity of the heart and lungs, so that women have difficulty breathing. The hormonal secretion of women in this stage is also disturbed and imbalanced, and the increase in weight and blood volume will lead to an increase in the burden on the heart and lungs of women, resulting in a series of manifestations such as arrhythmia, panic, chest tightness and shortness of breath. Clinically, it is possible to adjust the diet, adjust women’s daily routine to appropriately reduce dyspnea, while oxygen absorption assisted by the application of fresh vitamins, fiber, are able to improve dyspnea, but there may be some pathological reasons, such as heart and lung function abnormalities, if self-treatment can not be alleviated, it is recommended that hospital consultation, except for other diseases caused.