The etiology of vague pain in the abdomen after one week of intercourse may be: 1, no pregnancy, acute inflammation of the reproductive system, acute attack of chronic inflammation of the reproductive system. 2, pregnancy, fertilized eggs in the endometrium bed cause discomfort symptoms, manifested as a little vague pain and soreness in the abdomen; breast swelling, nipple tenderness; in addition, there may be a feeling of cold and exhaustion. If a woman is of pregnancy age, has the need to have children, and has intercourse without contraception, she can first pay attention to rest and observe for 3-5 days to see if the symptoms improve. If there is improvement, further diagnosis can be made in the gynecology department of a regular hospital in the 6th week of pregnancy; if there is no improvement, it is recommended to use the early pregnancy test to rule out pregnancy before considering the use of medicine. If the early pregnancy test does not work, it is recommended to go to the obstetrics and gynecology department of a regular hospital for further examination, and after a clear diagnosis, follow the doctor’s instructions for active treatment.