A little redness in the 40th day of pregnancy can be called vaginal bleeding during pregnancy. It is usually an abnormal condition and needs to be analyzed on a case-by-case basis, which may be a symptom of pre-eclampsia, or may be due to ectopic pregnancy causing uterine bleeding or indolent abortion. It is recommended to go to the hospital at the first time to clarify the specific cause and take targeted treatment. Common causes and treatment 1. Pre-eclampsia: Pre-eclampsia can be caused by low progesterone, abdominal impact, strenuous exercise or abnormal fetal development, manifested as vaginal bleeding and abdominal pain. If it is caused by low progesterone, usually progesterone can be used to preserve the fetus, avoid strenuous exercise in daily life and prohibit sexual life. She should pay attention to rest and take bed rest when she bleeds vaginally and avoid staying up late. 2. Ectopic pregnancy: Ectopic pregnancy usually refers to the fertilized egg that has been laid outside the uterine cavity, and tubal ectopic pregnancy is the most common. It can be caused by the rupture of the fallopian tubes and other organs due to fetal growth, resulting in vaginal bleeding and tearing pain in the lower abdomen. In case of ectopic pregnancy, you need to go to the hospital in time for ultrasound examination, and you can choose the appropriate surgery for treatment. 3. If you have vaginal bleeding in early pregnancy, you should seek medical advice to identify the site of bleeding and treat it actively according to the cause. If vaginal bleeding occurs in early pregnancy, you should rest in bed under doctor’s guidance, forbid sexual intercourse, avoid staying up late and overworking, and ensure sufficient rest. You should avoid stimulating food and maintain personal hygiene to prevent infection.