Nausea in the first trimester of pregnancy but not vomiting is mostly due to early pregnancy reaction. In the first 3 months of pregnancy, because of hormonal changes in the body, increased sensitivity to odors and excess stomach acid, pregnant women can experience nausea, which is a normal pregnancy reaction. Pregnant women do not need to worry too much, as nausea usually disappears in the 12th week of pregnancy. In addition, nausea in early pregnancy can be caused by disease factors, such as gastritis, hepatitis, cholecystitis and other digestive tract diseases. Patients may usually experience nausea along with other symptoms, such as abdominal pain, oil aversion and loss of appetite. Patients are advised to consult a doctor promptly to clarify the presence of the above diseases through appropriate tests and take medication under the guidance of the doctor for treatment. In case of nausea in early pregnancy, it is recommended to improve eating habits, eat less and more meals, and it is advisable to eat more light, refreshing and nutritious foods, such as tomatoes, cucumbers, mushrooms and apples. In addition, you can also eat acidic foods, such as grapes and oranges, which have the effect of appetizing and quenching thirst. You can also drink yogurt appropriately to promote digestion and absorption. If a pregnant woman has frequent nausea, which seriously affects her appetite, she can take vitamin B6 orally under the guidance of her doctor to relieve early pregnancy reaction.