The hidden pain in the abdomen after the second day of coitus may be caused by intense sex, or it may be caused by gynecological inflammation. In this case, it is recommended to go to the hospital in time to do ultrasound examination to see whether endometritis, pelvic inflammation or tubal inflammation. If the pain in the abdomen is caused by inflammation, it is necessary to carry out antibacterial and anti-inflammatory treatment in a timely manner, and prohibit coitus during treatment to prevent cross-infection. To actively cooperate with the doctor’s treatment, pay attention to rest in daily life, do not eat cold and stimulating food, pay attention to keep the abdomen warm, so as not to get cold. Before and after coitus, pay attention to the hygiene of the genital organs, and the partner should also pay attention to good personal hygiene, so as to better and more effective prevention and treatment of gynecological inflammation.