The symptoms of nausea and dry vomiting after 10 days of intercourse, if no effective contraceptive measures are taken during intercourse, it is necessary to consider whether the early pregnancy reaction is caused by conception; in addition, it may also be caused by gastrointestinal discomfort due to cold or improper diet after intercourse without attention to warmth: 1. If there is no contraception, the blood chorionic gonadotropin or HCG test should be performed to clarify. In general, if pregnancy is normal after intercourse, the egg and sperm will unite to form a fertilized egg. Ten days after intercourse, the fertilized egg usually has already settled and the body begins to secrete chorionic gonadotropin into the bloodstream. The symptoms of nausea and dry vomiting may be early pregnancy reaction, but it is difficult to determine accurately, because most of the early pregnancy reaction appears around 40 days of pregnancy, at this time, blood and urine pregnancy test is needed to clarify whether pregnancy; 2. It is mostly related to the patient’s cold, infection and irregular diet, and is not directly related to intercourse. Patients should pay attention to adjust the diet, choose a light diet, eat less and more meals, choose omeprazole and other drugs for treatment if necessary, and pay attention to changes in the condition. If symptoms of nausea and dry vomiting appear after ten days of intercourse, the patient should promptly seek medical attention for relevant examinations and carry out pregnancy preparation or targeted treatment for diseases of the gastrointestinal area after a clear diagnosis.