Pregnant women are a special group of people and need to be cautious when using medications because some of them may be toxic to the fetus. When pregnant women have cough and phlegm symptoms, general cough and phlegm medications, such as Ambroxol and Bromoxyn, are prohibited or used with caution according to the instructions. First of all, the most common cause of cough symptoms in pregnant women is respiratory tract infections, among which viral infections are more common, and viral infections are self-limiting and do not require antiviral treatment. If you have yellow pus sputum or even fever, you need to go to hospital for blood routine, sputum culture and other examinations, and then under the guidance of specialist for anti-infection treatment, generally penicillin, cephalosporin and erythromycin are pregnancy B drugs, which are relatively safe and can be used. If, after active anti-infective symptomatic treatment, the cough persists, accompanied by night sweats and low fever, then attention should also be paid to the screening for tuberculosis, which is prone to occur during pregnancy due to poor resistance, and tests such as sputum antacid staining need to be perfected. Secondly, because most of the drugs for cough and phlegm are contraindicated for treatment, if repeated cough, little phlegm and not easy to cough up, you can use saline nebulized inhalation if symptomatic treatment, or consume dietary therapy such as ice sugar snow pear and salt steamed orange. In conclusion, pregnant women should not use any medication when they have cough symptoms due to their special nature. It should also be noted that pregnant women who delay coughing without medication to avoid drug side effects are also at risk of developing other diseases such as serious lung infections, which can even be life-threatening. Therefore, it is recommended that pregnant women visit a specialist in a timely manner to further clarify the cause of the cough and then develop the next treatment plan based on the cause.