The phenomenon of redness in the 7th month of pregnancy requires observation to see if there is any pain in the stomach. If there is pain in the belly accompanied by redness, you should go to the hospital for an ultrasound to check the fetus, and then take birth control according to the results. In the seventh month of pregnancy, you can use the fetus preservation drug magnesium sulfate or nifedipine, this drug can inhibit the smooth muscle spasm of the uterus, relieve the uterus contraction, to achieve the role of fetal preservation. If there is only redness and no pain in the stomach, it is considered to be caused by marginal placenta praevia, which also needs to be determined by ultrasound examination. During this period, if the bleeding increases, you should go to the hospital for treatment as soon as possible to avoid excessive bleeding, which can affect the health of the pregnant woman and the growth and development of the fetus.