When you are 39 weeks pregnant with redness and stomach pain but the uterine opening is not open, you can usually go into labor in 24-48 hours.
At 39 weeks of pregnancy, you are already in full-term labor, and the onset of redness and stomach pain is a precursor to labor. You need to wait until regular contractions appear, the uterus gradually dilates, and the mouth of the uterus opens fully before you can go into labor, a process that lasts about 24-48 hours. The time may fluctuate from woman to woman, and at this point you should monitor the condition of the fetus and wait quietly.
If you experience redness and stomach pain in late pregnancy, you need to go to the hospital and wait for labor. During this process, you should keep a relaxed state of mind, save up your energy for labor, and monitor the condition of the fetus in order to promote the smooth progress of labor.