Abdominal pain before menstruation is not the same as pregnancy abdominal pain, mainly in the cause of abdominal pain, abdominal pain symptoms and other aspects. 1. The cause of abdominal pain: abdominal pain before menstruation is mostly due to the constant change of hormone levels in the body, with the onset of menstruation, abdominal pain symptoms can gradually disappear, which belongs to the performance of premenstrual syndrome. Pregnancy abdominal pain is due to the pain caused by the stimulation of the fertilized egg after its implantation. 2. Abdominal pain symptoms: premenstrual abdominal pain patients will feel the swelling of the entire abdomen, and usually accompanied by limb edema, weight gain, emotional instability and other symptoms. Abdominal pain caused by early pregnancy is also accompanied by a small amount of vaginal bleeding, frequent urination, breast swelling, breast fullness and other symptoms. If the symptoms of abdominal pain are not relieved, or accompanied by vaginal bleeding and other symptoms, you should go to the hospital in a timely manner, to identify the cause and give targeted treatment.