Pregnant women may experience breathing difficulties and breath-holding during pregnancy. Depending on the degree of breathing difficulties, the specific causes and measures include the following: 1. Mild breathing difficulties: mainly due to the gradual increase of the fetus in the mother’s body, which compresses the internal organs and lungs, resulting in restricted ventilation. At this time, you should immediately stop the movement, adjust the sitting position and adopt a semi-recumbent or upright position. Try to use the left lateral position for bed rest to reduce the compression and increase the amount of blood return. If necessary, oxygen can be administered under the guidance of a doctor, and about half an hour is appropriate each time; 2. Moderate or severe dyspnea: if dyspnea continues to worsen and you feel that you are holding your breath seriously, cardiovascular factors should be considered, and you should seek medical attention in a timely manner to conduct cardiac ultrasound, 24h ambulatory electrocardiogram and other examinations to exclude organic diseases. In particular, patients with pregnancy-related heart disease, hypertension during pregnancy and pulmonary hypertension should be hospitalized if necessary. If there are obvious symptoms such as cough and sputum, lung infection should be considered, and blood tests and pulmonary auscultation should be performed to provide targeted treatment of anti-infection, cough suppression and expectoration. In addition, pregnant women should also pay attention to proper exercise and adjust their breathing in general. Eat a balanced diet, eat more fresh vegetables and fruits, avoid straining and staying up late, and pay attention to sleeping in a left-sided position with proper adjustment.