Generally there is no problem with menstruation being pushed forward or delayed by seven days each, this is normal because the date of our menstrual period is not fixed, it is a floating state: first, if it is non-pathological, menstruation does not come, pain in the abdomen, then it may be due to the recent diet of cold, eating more grain, more cold times, as well as eating more sour and astringent things, which can cause menstruation to be The phenomenon of delayed menstruation. Secondly, it may be due to the occurrence of pregnancy, at this time you can go to the drugstore to buy pregnancy testing PH test paper, first of all, carry out the test yourself. The third, pathological menstruation did not come, abdominal pain, this may be the occurrence of gynecological diseases, may be the uterus, cervix and other conditions have problems, this time we can not judge out of thin air, should be timely to the local hospital, gynecological examination, and listen to the doctor’s guidance, further targeted treatment.