Redness in the first month of pregnancy is usually caused by the following conditions: 1. pre-eclampsia miscarriage, in early pregnancy, insufficient progesterone levels, fatigue, excessive stress and other conditions may cause pre-eclampsia miscarriage, which will cause vaginal bleeding; 2. biochemical pregnancy, the fertilized egg has not yet reached the uterine cavity, due to various reasons biochemical, will also cause the symptoms of redness; 3. ectopic pregnancy, when the fertilized egg is laid outside the uterine cavity Ectopic pregnancy is formed when the fertilized egg is laid outside the uterine cavity, and the symptoms of ectopic pregnancy include bleeding and abdominal pain. If you find redness in the first month of pregnancy, you should go to the hospital in time to have an ultrasound examination and monitor the blood HCG value, and take treatment measures according to the examination results. It is recommended to take rest in the early stages of pregnancy, refrain from sexual intercourse, have regular checkups, and treat ectopic pregnancy promptly if it is present.