There are many reasons for nausea and regurgitation on the second day of intercourse, including mental factors, indigestion and early pregnancy, which can be treated according to the causes. 1, mental factors: patients are worried about unwanted pregnancy or urgently want to get pregnant, caused by nervousness, anxiety, worry and other adverse emotions caused by mental stress, resulting in nausea and vomiting, in general, relax, listen to music, chat, walk, etc. 2, indigestion: if you get cold during intercourse, eat unclean food before and after intercourse, or eat too much greasy, cold, spicy stimulating food, can lead to disorders in the gastrointestinal digestive system, causing indigestion, which can lead to regurgitation. Therefore, in daily life, we should pay attention to dietary hygiene, avoid overeating, reduce the intake of stimulating food, combine work and rest, and enhance physical fitness through appropriate exercise; 3. Pregnancy: mostly accidental, if you are pregnant after last intercourse, due to early pregnancy reaction, resulting in nausea and regurgitation after this intercourse, it is recommended that patients should go to the hospital in time to determine the value of human chorionic gonadotropin by taking blood test To avoid blind medication affecting fetal development.