The nausea that occurs in women after pregnancy is caused by smelling greasy or special smelling food, and may be accompanied by dry vomiting or vomiting a small amount of stomach contents. In the early stage of pregnancy, especially in the third trimester, women often have morning sickness and vomiting, which are normal pregnancy reactions. After the third trimester of pregnancy, women’s nausea symptoms will be reduced and will gradually be relieved. If a woman has nausea in the early stages of pregnancy, she needs to go to the hospital to have blood tests for chorionic gonadotropin and progesterone levels, and a gynecological ultrasound to see if there is pregnancy vomiting or gravidity, and to give timely symptomatic treatment.