The difference between pregnancy-induced abdominal pain and dysmenorrhea: 1. When pregnant, abdominal pain often has a history of menopause, while dysmenorrhea does not have a history of menopause. 2. If abdominal pain occurs after pregnancy, it is often caused by exertion, sexual intercourse or due to progesterone deficiency, while dysmenorrhea is not related to the above factors. 3. The result is positive for blood HCG, but negative for menstrual cramps. 4, vaginal bleeding will occur in menstrual cramps, but vaginal bleeding will not necessarily occur in abdominal pain after pregnancy, which can be distinguished by laboratory tests and ultrasound.