Redness in the 5th month of pregnancy without abdominal pain should be taken seriously and promptly seen. Seeing red generally refers to vaginal bleeding, which may be caused by pre-eclampsia, placenta praevia or cervical lesions. 1. Pre-eclampsia: If vaginal bleeding without abdominal pain occurs in the 5th month of pregnancy, it may be due to pre-eclampsia, and the pregnant woman may have a feeling of lower abdominal cramping, and she needs to rest properly, while she should avoid intercourse. If paroxysmal abdominal pain occurs with increasing intensity and vaginal bleeding increases during the process of fetal preservation, it is recommended to seek medical attention promptly to clarify the cause and then treat it. Pre-eclampsia may be caused by luteal insufficiency or hypothyroidism, the former can be treated by intramuscular progesterone or oral progesterone preparations, the latter can be treated by oral small doses of thyroid tablets. After the vaginal bleeding stops, if the ultrasound examination indicates that the embryo is alive, the pregnancy can be continued. If the examination indicates that the embryo is stunted, the pregnancy needs to be terminated under the guidance of a doctor. 2. Placenta praevia: the normal placenta is attached to the anterior wall of the uterus, the posterior wall of the uterus, the bottom of the uterus, etc. Placenta praevia is a placenta located in the lower part of the uterus with the edge partially reaching or covering the cervical opening. Pregnant women with placenta praevia may have vaginal bleeding without abdominal pain during pregnancy, which needs to be confirmed by ultrasound examination. Pregnant women need to rest in bed, correct anemia and take antibiotic drugs under the guidance of the doctor. If the gestational week is less than 34 weeks, the contractions can be suppressed, at the same time need to be closely observed and related examination, such as repeated heavy bleeding, patients need to follow medical advice to choose to terminate the pregnancy, including cesarean section and vaginal delivery and other two ways, according to their own physical condition and doctor’s guidance to choose the appropriate way; 3, the placenta position is too low: when the placenta position is too low, there will also be 5 months of pregnancy vaginal bleeding without abdominal pain Generally speaking, the placenta will grow upward with the growth of pregnancy week. It is recommended that pregnant women take more bed rest, avoid straining and strenuous exercise, and avoid standing for a long time, etc. If pregnant women have repeated bleeding, it is recommended that they seek medical treatment in time to clarify the cause of the bleeding. If there is no abnormality in the screening, pregnancy can be continued during the follow-up; cervical polyps need to be closely detected and carefully treated, firstly to ensure the normal development of the fetus, and secondly to avoid the female uterus from being affected by cervical polyps, in addition, pregnant women can be prevented during pregnancy by maintaining good hygiene habits, cleaning the vulva with warm water and choosing loose underwear and In addition, pregnant women can prevent it by maintaining good hygiene, cleaning the vulva with warm water and choosing loose underwear and outerwear. During pregnancy, women need to avoid intercourse or other strenuous exercise and take a walk; pay attention to a balanced diet and good lifestyle habits; take regular pregnancy tests, monitor progesterone, estradiol, blood HCG levels, and detect fetal development through ultrasound.