Nausea in the second trimester of pregnancy, but not vomiting, is a relatively normal pregnancy reaction. After pregnancy, the chorionic gonadotropin in the body is elevated, which will lead to pregnancy reaction, manifested as anorexia, loss of appetite, nausea, vomiting, drowsiness, etc. However, due to the different physical constitution of each person, the performance of pregnancy reaction is also very different, either mild or severe, just nausea, no vomiting means that the pregnancy reaction is relatively mild. Pregnant women can maintain a good mood, eat less and more meals, eat more light food, such as fresh vegetables, and pay attention to drink more water to maintain the water-electrolyte balance in the body.