A cold and cough in the fourth month of pregnancy usually does not affect the baby. If the cough is more violent and the body is poorer, preterm abortion may occur. You can drink more water, which is good for the dilution of phlegm and can promote the discharge of phlegm, and supplement vitamin C, which can improve the body’s immunity and promote the recovery of the cold. If the cough is caused by wind-cold cold, you can take a decoction of 10 grams of ginger, 10 grams of white onion and 15 grams of Chen Pi with water and drink it as a substitute for tea, which has the effect of dispersing cold with pungent warmth and relieving cough and asthma. If the cough is caused by wind-heat cold, you can use Mulberry Chrysanthemum Drink plus reduction, which has the efficacy of removing wind and heat, promoting lung circulation and relieving cough. The combination of Chinese and Western medicine can shorten the cycle and improve efficiency when treating a cold and cough.