The redness and pain in the abdomen after 5 weeks of pregnancy may be caused by hormone level disorders, uterine contraction, and pre-miscarriage. 1. Hormone level disorders: in the early stages of pregnancy, due to the instability of the fertilized egg implantation, after anger may lead to hormone level disorders in the body, especially when estrogen and progesterone levels change, it may also cause a small amount of vaginal bleeding. 2. Uterine contraction: After getting angry, due to excessive emotional fluctuations, it may lead to increased blood pressure and accelerated blood circulation, which may induce uterine contraction, thus causing vaginal bleeding. 3. Pre-eclampsia: Some pregnant women who have pre-eclampsia may also experience redness and abdominal pain after getting angry. During pregnancy, redness, abdominal pain symptoms, it is recommended to go to the hospital in a timely manner, to clarify the cause of the disease and targeted treatment. During pregnancy, pregnant women need to pay attention to rest, avoid overwork, and maintain a good mood.