Phlegm in the throat of pregnant women may be due to upper respiratory tract infection, gastroesophageal reflux. The cause of the problem can be dealt with. 1. Upper respiratory tract infection: phlegm in the throat is due to infection of the upper respiratory tract, inflammation stimulates the mucous membrane of the respiratory tract to continuously secrete mucus, thus producing phlegm. For pregnant women, it is recommended to use safer medications, which can be taken under the guidance of a doctor, oral anti-inflammatory tablets to reduce inflammation, and oral solution of Ambroxol hydrochloride to reduce phlegm. 2. Gastroesophageal reflux: As the uterus gradually increases, the intra-abdominal pressure may gradually increase, which can press on the stomach and cause the stomach contents to flow back into the throat through the esophagus, which can stimulate the mucous membrane of the throat and lead to an increase in throat secretions. It is recommended that pregnant women eat more oranges, apples and other fresh fruits, which can help dissolve phlegm, and the fruit acids within the fruit can also help digestion. In addition, it is necessary to drink more water on weekdays, which can promote the body’s metabolism; moderate exercise can also enhance resistance and reduce the risk of respiratory tract infections. It is recommended to seek medical attention if the above symptoms are not relieved within a short period of time, and pay attention to keeping warm and avoiding injuries during pregnancy.