If you have vaginal redness and lower abdominal cramping after pregnancy, you need to seek medical attention promptly, which may be caused by preterm miscarriage or preterm labor, and you need to carry out fetal preservation treatment. The specific treatment for fetal preservation should be chosen according to the reasons.1. Premature miscarriage: pregnant women need to seek timely medical attention for HCG and progesterone examination, if the results show that the hormone level is reduced or the development of the gestational sac is poor, progesterone and dextran can be chosen to maintain the luteal function, and human chorionic gonadotropin can also be applied for fetal preservation treatment, and attention should be paid to bed rest.2. Premature labor: its main manifestations are irregular contractions, a sense of fetal descent and a small amount of vaginal lightness. If the pregnant woman is 28 weeks to 34 weeks of gestation, she can be treated clinically with nifedipine, magnesium sulfate and progesterone; if the pregnant woman has preterm labor before 34 weeks of gestation, it is recommended to use dexamethasone to promote fetal lung maturation for treatment in time; if the gestation is more than 34 weeks, further observe the contractions and treat under the guidance of the doctor; 3, placental abnormalities: if the pregnant woman If the pregnant woman has vaginal bleeding, it is recommended to seek medical attention and apply contraction-inhibiting drugs such as magnesium sulfate and progesterone under the guidance of the doctor; if the bleeding is caused by placental abruption, it is necessary to send the pregnant woman to the doctor for treatment in time, and clinically, the shock is usually corrected by actively transfusing blood and maintaining the stability of systemic blood circulation, while detecting the fetal heart Under the guidance of the doctor, we can choose to terminate the pregnancy according to the severity of the condition of the pregnant woman and the condition of the fetus in the uterus. During the treatment period, we should avoid intercourse, keep warm, eat a light diet, and keep a calm mind to avoid excessive anxiety and tension that may affect our health and that of the fetus. In addition, you should actively cooperate with the pregnancy checkups and take timely treatment measures under the guidance of the doctor if abnormalities occur.