It is advisable to use early pregnancy test or go to the hospital to have a blood test for human chorionic gonadotropin value, if the value is greater than 20 U/L, pregnancy can be confirmed. Nausea is caused by an increase in the level of human chorionic gonadotropin in the body after pregnancy, which is a normal pregnancy reaction and generally does not need to be treated. It is advisable to eat a light diet, do not eat spicy and stimulating food, do not use drugs indiscriminately, avoid viral infections and ionizing radiation. The possibility of nausea caused by indigestion cannot be ruled out. If pregnancy is ruled out, if nausea continues to be unrelieved or if other discomfort such as diarrhea occurs, it is advisable to go to the hospital.