Red discharge at 5 weeks of pregnancy with normal HCG may be a manifestation caused by a prior miscarriage, biochemical pregnancy, ectopic pregnancy and so on. 1. Pre-eclampsia: In the 5th week of pregnancy, if the pregnant woman’s abdomen is hit by an external force or if she is overly anxious and stressed, it may induce uterine contractions and cause pre-eclampsia, which may lead to a small amount of vaginal bleeding with red discharge, and the HCG may be normal. 2. Biochemical pregnancy: If the fertilized egg does not develop in the uterine cavity, it may cause biochemical pregnancy, which may cause vaginal bleeding, resulting in a reddish discharge, but the blood HCG has not been significantly reduced, and the HCG may be normal. 3. Ectopic pregnancy: If the gestational sac grows outside the uterine cavity, s may cause red discharge at 5 weeks of pregnancy, and blood HCG may be at normal levels. Red discharge at 5 weeks of pregnancy with normal HCG, you need to go to the obstetrics and gynecology department of the hospital, under the guidance of a professional doctor for diagnosis and treatment.