Pregnant women should not smell Chinese medicine for a long time. A small amount of Chinese medicine smell will not normally affect pregnant women with mild pregnancy reactions, but may aggravate the uncomfortable symptoms of pregnant women with strong pregnancy reactions. The smell of Chinese medicines is usually not toxic, but some medicines contain volatile components, which may have some effects on the human body. The flavor of Chinese medicines has a certain degree of irritation, which may cause nausea and vomiting, dizziness and fatigue, and other adverse reactions in pregnant women. In addition, if someone decocts Chinese medicines with toxicity, such as Chuanwu and Zhanwu, pregnant women should try to stay away from them. Pregnant women with allergies should try not to stay in places where the smell of Chinese medicine is strong. Pregnant women who are not feeling well should seek medical advice and use medication after consulting a physician.