If you are pregnant, it is possible that you are not pregnant this time, but you have been pregnant before, and after intercourse, your uterus is stimulated and involuntary contractions occur, resulting in pain after intercourse; it is also possible that you have pelvic inflammatory disease, which causes pelvic adhesions during intercourse, resulting in pain in the lower abdomen; it is also possible that Women with uterine adenosis or endometriosis may also experience pain in the lower abdomen after intercourse. Therefore, when there is hidden pain in the abdomen after intercourse, it is better to go to the hospital for ultrasound examination to clarify whether there is pelvic fluid or adenomyosis, or whether the pain in the abdomen is caused by cold or other gastrointestinal diseases, and it is recommended to go to the hospital for early pregnancy examination 1-2 weeks after intercourse to exclude pregnancy or ectopic pregnancy for timely treatment.